TBH, It's like that at a lot of stakes, but for different reasons I think.

At the higher limits, people stack off with top pair because their opponents are getting agro with less. At lower limits, I think it tends to be more like people are 1 tabling and bored, they hit top pair and go with it. In the middle it's probably a mix of the two.

I play teetering on the edge of lagg and tagg, so even regs are finding ways to stack off with TP against me, and occasionally they're right.

At any limit, if you're a reg and you haven't seen a player before, I think it's best to assume they're your average donk. In this case I think I stack off with KK at any limit. It's a 2-tone board with a possible straight draw, my 100bb stack is finding it's way into the middle.