Criminal trespass doesn't work that way. For the most part, you have to have clear knowledge that you are on someone else's property without permission - for e

Criminal trespass doesn't work that way. For the most part, you have to have clear knowledge that you are on someone else's property without permission - for example, climbing over a fence, or walking past a "No Tresspassing" sign. If someone invites you into the Y Combinator offices and gives you the door code, you're not trespassing.