They can't take back the fact that there were currency controls and the banks closed.
The people won't forget to quickly, if anything I would expect the Greeks to buy more if the crisis is temporarily over.
At the moment others should be leading the charge, if it can happen in Cyprus and Greece, why not Spain, Portugal, Italy or France?
I will laugh like a maniac, if Greece somehow manages to make a deal.
Doubt the troika will go along with it. Any deal that is put forth will include a Greek capitulation. And a worsening of the austerity measures, which Greece will never accept and probably couldn't survive with. The referendum is maybe a way for them to try and improve their negotiating position. But I doubt it will work to reach a deal anytime soon.