Like I said, this was one of two GMs I've had who felt their role was to beat the PCs (one of them openly stated that his goal was to kill every PC, every time), and any time they could trick or fool the players was a bonus. There were lots of leading descriptions, specifically leaving out details unless we asked--the whole game was a series of "gotcha!" moments and increasingly ridiculous precautions.
Again... eerily familiar, almost worryingly so.
Said GM also has a policy of attempting to screw players for gold, boons, and of course, kill as many as possible usually by take-backs, fudging rolls and modifying statblocks (I've subsequently read the mod last night, the enemies could only hit on a 20, no crits were declared and yet somehow they all hit every time), and most notably, taking the absolute worst-case, selectively literal reading of events in a module, and then using them to try and 'Gotcha!' PCs.
As I said, this was far from the most egarious thing that happened in that game. My personal favourite was this one, explained by analogy to prevent spoilers:
GM: As the last enemy falls, the burning building you're in begins to tremble and shake, heralding a collapse. We're going to remain in initiative. What are you doing?
Player whose turn it is: Well, the exit is only two squares away, right? I leave.
GM: Right, you leave. The building collapses and the rest of you are all killed. See, it says here in the mod that "as the PCs exit the building, it collapses, killing anyone left inside." The rest of you are all dead.
I've talked to other players on that table. We're quite a diverse group; although we all enjoy Pathfinder Society play, we value different parts of it. One other player is very much a rules-focused player. I, on the other hand, am a story-focused player*. The idea of using a cinematic event as an excuse to kill player characters rankles me.
Complaints were made (and are continuing to be made). The letter I'm writing to one of our VC's is long, detailed, and only after being written after other instances of this kind of behaviour lead me to believe that change is not possible for this particular GM (and the mods were read and reviewed).
*Note that good roleplaying doesn't preclude making powerful characters. As I said, the mobs could only hit my PC on a 20. Said GM openly declared that he didn't like how I built and ran my characters, so I suspect his solution for me building characters that can't be hit by a typical mook was to just decide that everything should hit anyway, because reasons.