one of my buddies is blocked by a few fighters, all for hilarious reasons. he got blocked by tito for asking him how many days it took to shave his head.
here are a few tips on helping get responses from fighters.
it helps to tweet fighters when you see they are using their twitter at that moment.
try tweeting guys w/ less followers. they're less likely to be overwhelmed w/ mentions & replies.
try sucking up. never hurts
Fighters or Fight related accounts I've had respond to me or retweet me:
Amir Sadollah (argued the Diaz/Condit decision)
notice, most of the guys that respond are nowhere near as popular as Jon Jones, Chael, GSP, BJ, etc.