I am 8,000 hands into my first $100 at Absolute, and doubled my stake quad tabling at the 0.1/0.25 NLH 6-max tables. I'm winning, but I keep seeing these nits reraise all-in. Example: I have JJ on the button, raise 4xBB into an unopened pot. I guess this looks like a blind steal, 'cuz the BB rr's all-in (about 150xBB). I have it covered, should I call the shove?

I have been auto-folding (and winning overall), but are these fish? Am I the one losing value? At low stakes NLH, how common is this tactic from good players? And how often do you call an all-in rr w/ pairs like QQ and JJ?