Based on all these above comments, it’s pretty clear that it’s every man, and woman, for themselves.

It's difficult to understand what you're trying to say. If you're saying that it's not allowed to leave the roundabout from the inside lane, you're wrong.

It appears that you do not know how to drive thru a roundabout correctly.

Eventually you will hit another car and you will have to go to court. When you are shocked to find that you were at fault, maybe you will then learn how to drive thru a roundabout correctly.

When you enter a roundabout, you MUST yield to another car already in the roundabout.

Ok, I finally figured out what you were trying to say and it is 110% wrong. Please learn how to navigate a RB or post a schedule of when and where you’ll be driving in one so the rest of us who know what we’re doing can avoid you.
PS: based on the understanding of driving RBs you’ve posted, you won’t be suing anyone

Yeah, that is about right.

I always drive slowly in a roundabout and have my hand on the horn. If I see another person driving incorrectly, I give them a long honk and keep honking until they are out of my way.

And they just immediately obey your horn and get out of your way??? Hmmm—-I thought so

How about everybody just slow down and drive defensively?

Roundabouts are just like an intersection with a traffic light. If you are turning right, you must be in the far right lane before entering the circle. Just like at a traffic light. Signal, then make the right turn keeping your lane.

If you are going straight thru, you can be in either lane, you do not signal, and exit on the opposite side of the circle.

If you are turning left, you must be in the left lane before entering the circle. Just like at a traffic signal. You signal that you are turning left. When you proceed, You will be on the inside of the circle. Drive thru until you reach the exit, keep your lane and exit. No need to cross over lanes. The circle is designed to avoid this. The lanes lead you out without confusion everytime!

If you have to make a full circle, you must be in the left lane. Just like if you were making a u turn at a traffic light. Signal, then make your u turn inside the circle. Signal right to exit. Again, the lane will lead you out without having to cross lanes.

How and why is anyone crossing lanes? Just pretend there is a traffic light at each circle. Am I wrong? Starting to second guess myself.

Such Fun! And standard intersections aren't much safer.
Be careful.

Just this. If you enter from the left lane, you must continue straight on or take the 3rd exit. Both situations require you to cross the outside lane at some point to exit.

Yes, they usually do.

In case they don't, I can easily avoid them because I drive so slowly, and I keep honking at them.

Gotcha! But, I was assuming the driver wishing to enter knows to yield.

From my experience, that is true usually, but not always.

Occasionally I see a driver trying to enter the roundabout without yielding but, since I always have my hand on the horn, I honk at them and continue honking until I am well out of the way.

May depend upon signage. Some folks say that it is against the law to change lanes once you are in the roundabout. That logically cannot be correct. If you are on a two lane road entering a two-lane roundabout that has four inlet and outlets and you plan to go to the 3rd exit, you are normally expected to enter on the inside lane which allow exit on the 2nd and/or subsequent exits. So, you enter the inside lane and pass the 2nd exit , you now need to switch to the outside lane to exit at the 3rd exit from your start. However, you may be in competition with someone who has entered after your start. That is where your driving skills are put to test. That is not the time to assume you are OK to turn because you are ahead of the competition. This is the time to actually see acknowledgement OK to turn or make another revolution. You also have to understand that others may have a different understanding than you. Also, you have to pay attention to road markings

I spent many years in the Boston area with its much more complex road system and rotaries. The common theory there was to make sure you got the other driver's attention and agreement before a move.

It is irresponsible for posters to make statements of law that are not known to be true.

Confused again! If a driver is in a roundabout with his signal on, why is there another driver entering the circle? They must yield to the driver who has signaled before entering the circle.

If someone can't wait a second or two while the signaled vehicle crosses over to exit, they have problems I will never be able to solve!

It probably takes a signaled driver less than 20 seconds to enter and exit a roundabout if doing it correctly. How are you people driving in circles, honking horns, and avoiding getting hit? Get in the correct lane before entering the circle, wait until it is your turn to enter, then proceed with your signal on.