I went inside a vault inside a middle school and after I cleared it out and went outside to leave the door with bars on it that was open when I first walked up to it was closed and their were 20 landmines in the same place I just walked through less than 10 minutes before like someone has been watching and set it all up, it creeped me out because this never happened on my other charicters.

who knows. I think there was a couple mines when I left there as well. Likely some gunner coward who heard me slaughtering everyone inside and felt the only hope of killing me lay in land mines?

I've cleared out areas before and on the way out encountered spawning armies of synths.

That's one thing I've been meaning to mention somewhere..... if you disarm some mines (or blow them up) and then reload a save game BEFORE you disarmed / detonated them.... the mines won't be there. Which makes no sense to me, since the savegame is supposed to put you back to the point you were ~before~ you disarmed / detonated the mines. But, no, they're gone entirely on a reload.

I always interpretated this as a good thing.

'coz you know, either you spot mines and disable them or well, if you don't, in case you'll die or whatnot, they'd be removed.

Getting past it ok, rewarding with easy loot for dieyng.

Thought some mines are really well disguised and very hard to disable.

no their were no mines when I eneterd the building, only when I left, it was creepy. I think Herobian is following me.

That is very weird! Have you made any enemies? Wait, what am I asking, of course you have enemies! You are a meanie, who blows up innocent people and children!!!! LOL

na this was on my good character who saved everyone at the institute and blew it up with the Railroad.