Oh yes, trauma from bullying or other humiliating experiences can lead to paranoid feelings. There's another guy at work who also got bullied, but his was because of the colour of his skin. So we have that in common where we're both targets for bullies, and he's paranoid too and thinks objects are being planted in places to "catch him out", and that's how I feel about things too, like things are planted in ways that will test to see if I really am the lying thief this bully was calling me. Like last week I was asked to clean a backseat on a bus (my job is a bus cleaner), but when I got on it I saw there was money put quite neatly on the seats I was asked to clean. I mean it could have been just left behind by a passenger, and we are allowed to take money we find on buses if it's under £20, and this was only about £1.80. But I didn't want to take any chances, so I handed the money in to the office.
The other day I found some unopened doughnuts on a bus that I thought the guys in the workshop would like, and I put them on the same table where the bully put his food. Nobody knew who the doughnuts were or why they were there, but later on that same day there was only one left, so they'd obviously helped themselves. I mean, the doughnuts could have been mine that I'd just put there to eat later. They probably just assumed they were put there for everyone, just like I did with the chocolate. And would they deny it if I'd asked who'd eaten the doughnuts? Maybe. Would I care (if they were mine)? Not really. I would just know in future not to leave my food where it can get eaten.