Honestly I don't think its that much of an issue, unless you are starting to verbally lash out at people just for hanging around the barn. I personally have no problems if someone ASKS me if they can feed my horse a treat (while I'm there), but if they just wander by and feed her, or make a habit of walking by and always giving her something, then I get upset, because she can start to get pushy, and I hate that. I don't personally feed her treats very often, for good reason. I want to start having someone else handle her a bit, because as of right now, she won't let much of anyone else handle her, and in cases of emergency, ect, I want to feel better knowing that even if I can't get out there immediately, that someone else will be able to catch her or hold her for a vet until I can get there, but I am so picky about how she is being handled. She's in a paddock with several other horses, and I don't believe that anyone has actually messed with her, or hit her or whatever, but she's started getting head shy dealing with ropes and stuff, because a couple of the new horses like to try and bolt out of the pen when someone is taking another horse out, so we have to have a whip or something just to make sure that we are given enough space to get out, and I respect that, but at the same time, it bugs me that for whatever reason, just someone swinging the lead rope around the gate has made my horse get nervous. I will speak up and say something if someone is doing something directly at my horse, but otherwise, I just remind myself that I'm sure some of the other people at the barn feel the same way about their horses that I do about mine, and that so far we are all respecting everyone else's space.