I learned a long time ago not to trust anyone. Most people will snitch on you, backstab you after you just helped them out, use you, abuse you, spread rumors about you, etc... I especially had to learn the hard way in the work force. All the managers and crew gossip. It's like we went back into time and are back in high school again. I don't trust anyone anymore. Parents say to trust them, you can't. Friends that I used to have did it too. I tend to keep to myself because of all the drama I try my best to ignore, everywhere. I don't care about anyone else's business but my own. Do you trust easily? I don't.
When I first read your question I said to myself, that I trust people until proven otherwise but after reading the comments, it's more like I give them the benefit of the doubt but I'm pretty careful not to taken for a sucker. I guess I'm skeptical of people the same as I'm skeptical of information.
OK, Firstly I read your post, and yep, my experience is the same, I am so disappointed and disillusioned and so deeply. So, I am very critical, I don't just accept things, I check them out. Now when I check a person out, ie a situation comes up where trust is required, i am diligent, and if I can find nothing adverse, I try and give them "ONE" chance to let me down, as I say to anyone, God doesn't get a second chance. The depths people will go to in order to get their own way or to hurt someone always catches me unprepared. Partners have been among the worst for me and the biggest disappointments. But this is why I still trust, I don't want to close the door to the chance that a really nice lady may come along who wouldn't turn on me. Hence giving that chance. Even now thinking how people have acted makes my head spin.
I trust people to a certain extent by default.
Conversely, I prefer to sit with my back to a wall, and try to keep myself out of situations where my trust can be taken advantage of.
Trusting but cautious, I guess, and with a small portion truly in my close circle.