I don't think that here are people capable of trapping very often...Maybe he just tought: "good odds to call with JQ" and then: "He checks, he has overcards."
Why not? I would say pretty standard line from them to take here. He is not shipping with worse here.
Maybe even Tx.
(How % of 3bet from position must he has that we think that he 3bet us light..over 10?)?
Over 10 is good, although once again sample size is important. I'd prefer to have at least 200. Depending on the actions/image and on the opponent we might reduce it.
What about if they are maniacs...i met players who shoved J4s an K5o in their shove over mine 4bet?
Well, A7o ain't a hand which we gonna pick to go broke against them. ♦
And another question...do you think that regs often 3bet bluff us from blinds if we raise from hijack or cutoff? And if you advice doing that sometimes against regs?
Not on those limits. Rather nope. But of course it's more likely in SH than FR. Really depends on the opponent and table dynamic. That's why you play SH, ain't it? To watch the opponents play and postflop play.
And just one more...do you advice squezing light oop/ip if they are 2 regs on nl10?
Well, depends how light. What kind of cards are in your mind? I'd still advice to have some kind of equity against their calling range. Not with something like 57o. ♦