Like most other things, this is a complex issue. If somebody has behaved irresponsibly then i can understand not wanting them on your land no matter what. But on the other hand, just because you have had a bad experience with one person doesnt really justify denying anyone else the right of retrieval. It is kind of like refusing to let the neighbors kid come into your yard to get his soccer ball just because another neighbor kid soaped your windows during Halloween.

Call me overly mellow, but I get along with everybody who owns land anywhere near mine, and I dont care if they go on my property to get a deer whether they ask permission or not. I just dont dwell on stuff like that, but that attitude could change after some bad experiences, i guess.