At FT of 45 man sng the other day. I was midstack (about 6000 chips), blinds were in the 200/400 range. 6 players left.
I get 2c9h in the BB. Normally, I fold this to any raise or check fold.
But I decided to "defend my blind" since there is little chance of picking it up if I check it in.

2 limpers ahead, I raise 4xBB.
1 caller. (another mid stack)
Flop comes rags (I didn't even look except to verify no paint)
I push.

Too aggro?