How bad is this?
 

With no other info except that tournament average stack is about 5500, Hero has folded the last 20 or so hands, and no read on the villain, how bad is this play?

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed) FTR converter on zerodivide.cx

MP3 (t8130)
CO (t8750)
Button (t8290)
SB (t4780)
Hero (t2910)
UTG (t3020)
UTG+1 (t6705)
MP1 (t1525)
MP2 (t880)

Preflop: Hero is BB with 5[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">6 folds</font>, <font color="#CC3333">Button raises to t825</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t2910</font>, Button folds.

Final Pot: t3910

Re: How bad is this?
 

Looks fine to me. Avg stack is really pretty unimportant here though.

Re: How bad is this?
 

Well, it worked, so it was an excellent play.

But with no read on the button, it's a risky play at best. If he can call, you're toast. And what were you doing while you folded 20 hands that you have no read on the button?

(The spots I pick to defend against steals with trash always seem to be the ones where the "thief" has AA or KK or something, so who knows what my opinion is worth here.)

Re: How bad is this?
 

looks good... above average raises from the button have a high probability of being steals. Good play.