Most law abiding citizens will respect a No Trespassing sign and it also provides legal protection. People seem to be implying that No Trespassing signs are rude. I don't share that perception, at all. We see them quite frequently when we're out hiking or riding horses and we respect them. You may want to include a "please don't feed the chickens" sign as well, in case someone ends up tossing bread over the fence...
