Acting to get a call is an old past-time in sports, and something which I don't have a problem with. This is something which Duke tends to excel at, in fact. If something is legal and will increase your chances of winning, I see no problem with it, even if it is frowned upon (as flopping generally is). We've had some of the best here at duke, and I personally think it's genius to do.
Need I remind you of this incident?
http://www.youtube.com/watch?v=s0upQDkY-pg
When someone says "but duke flops all the time so they get all the calls," my response is "well if you get calls from it, how come your team isn't smart enough to do it too?" While I can't stand the whole shoulder bump stuff that goes on (it happens in almost all college games during free throws...sort of a dominance thing i guess? i don't get it), Kemba made a conscious decision to do what he did and he got his team two points from it. Maybe it's cheap (so is flopping on charges) but it gave his team a better chance to win, and I can't fault a kid for that.