My observation / experience is that providing a golfer gives a putt careful attention, 2' is to amateurs what 3' is to pros - 99% make. At 3', the make % goes down a little so these should be putted out. Unfortunately this has applied to me as well.
There is a difference between what is right and what is acceptable, obviously. but, play golf however you want to play golf. it's your game. do with it what you wish.
I'm a pretty social golfer and typically just go along with what the group does. That said, I never take a putt that I'm not given. If i don't hear the words "thats good", I'm putting. but normally, anything inside the leather is given (unless its matchplay and the hole is on the line or something.) And, with that, I don't really feel bad about it. I played 5 rounds of tournament play this summer and didn't miss a single putt inside 3 ft. so, when someone gives me a 2 footer, i don't feel like I'm stealing a stroke or anything,