I'm personally a bit ambivalent on the issue.
I can see the arguments on both sides, but then if we're going to really go back to being purists.....there are a lot of other things that need to be changed;
- Adjustable clubs.
- Balls that are engineered to go further, than the skill level warrants.
- Putters anchored against forearms and putting grips that do not keep both hands on the club grip.
- Range finders/GPS's.
- Grooves and club faces engineered to maximize spin.
- Etc., etc.
I've personally never used an anchored putter, but there is still so much other skill needed (reading the slope, speed and having the touch to go the correct distance)...I don't see how anchoring is going to be the end of golf.
.