Re: how not to fall for feints?
You react to feints by ignoring that they exist.
A feint is just a punch your opponent didn't throw. No hurt, no points.
Anything bad that came out of falling for a feint could just as well have happened if your opponent threw an actual punch.
You have the slick counterpuncher type like Roy Jones, who is quick and crafty and tries to get a guy to commit to his feints. But as bald_head_slick correctly said, when you're outslicked, falling for feints is the least of your problems.