I've never experienced "fake" bonding on mdma. I still know quite well which people I like and which I want to keep away from, and any bonding that occurs feels real afterwards, too. In my experience mdma amplifies positive feelings and makes them easier to express, but it doesn't create them. In fact that's my experience with most drugs I've tried - they amplify what's already there. Which is why set and setting are so important and drugs don't help much if you're starting from a bad mood. And it's not only bonding with people - I've often been clubbing, took some amphetamine and/or mdma, and then some more, only to have the euphoria finally kick in when the music became really good.
I've also decided a while ago already that for me taking mdma alone, with people I don't already like a lot or without an opportunity to talk, cuddle and/or have sex is a waste of drugs.