[Toymeister]

What is extremely clear to me is most posters do not understand what the OP stated, nor has he come back to clarify.

The trikes, that's what three wheeled bicycles are called, were riding single file, one behind another. This is what the OPs post is about. They were not running a two lane blockade. Trikes are wider than bicycles, they are 36 to 42 inches wide. The trikes, which he is certainly speaking about, are tadpole recumbent trikes, low to the ground, peddles up front, one wheel in the rear. As the OP stated they were spaced far enough apart to not allow passing. Imagine two cement trucks which you want to pass in your car on a two lane road, if you feel that you can't pass both trucks you might pass one then later another. This is what the OP wanted to do.

Just as it is in your lifetime of driving experience, most drivers do not want to do this, or at least some do not. If that one person was the first driver then it slows the traffic. But only if there is not enough room to do so safely. As I have mentioned already if there is any exceptionally great place to pass in TV on a MMP it is where the OP described.

Back to the trikers, they're in single file they did not follow closely because trike or bikes do not have brake lights. Trikes are easily damaged if the most outward part (the boom to which is attached the crank) is struck by anything. In other words the rear triker did not want to hit the front triker if s/he stopped. That was a long explanation to say spacing makes absolute sense for two trikes.

Now why would two trikers not "allow" any cart to pass. Well any cart could do so if it was safe and if the cart drivers are proficient in operating a golf cart.

The trikers probably weren't aware of anything behind them. Trikes are extremely hard to mount a mirror on as they don't have handle bars. If they were aware of someone behind them why not pull over? My speculation is they know, as anyone who has operated a trike knows, trikes are extremely hard to start from grass. The drive wheel tends to spin and you simply do not have the leverage of standing on your peddles as a bike operator does. It is simply the body mechanics of recumbents. Most recumbents utilize shoe clips, your shoes, and thus your feet, are attached to the peddles, meaning you can't crab walk out of the grass.

Now of course this knowledge won't stop the vitriol of the obsessed bike haters on this thread but I hope it helps some.