Really? What would they do with someone else's not "trapsing on me land" signs, since they are supposed to be signed and dated by the landowner by most states I've seen hunting regs?
Although, you see all sorts of crazy excuses for no tresspassing "signs" (not yours of course) (e.g. plastic oil jugs, old tires, some beat up old piece of something wrapped aound a post where you see 5 letters of it.)
I like the ones that at least say "No... without permission from the landowner" and they give you the person's name and phone number on it we can call. We can live with that.