I have two horses who live with my PIL (not a PIL bashing thread).
The field is along the side of a road near a new build housing estate thing. All along it there are fairly massive signs asking people not to feed the horses because horse 1 has a horrid past and one of the hang overs around that is he is really aggressive around food, horse 2 is fucking fat.
Today I was at my PILs, rode my horses and put them in the field. I saw when I was tidying up the stables a small child standing right on the fence leaning into the field, with mum there, trying to feed them their sandwiches 
I walk over and really nicely ask them to not feed the horses, thankfully only Hippo was showing an interest at this stage, not the one who would be in prison for GBH if he was a person.
Woman then lays into me saying her daughter has SN and if she wants to feed the horses she can etc etc.
I point out the fact that one is obese and one is a thug, and she storms off calling me a joyless bitch and saying I ruined her child's day, and loudly saying to the girl that all people with horses are stuck up and nasty.
AIBU to think she was a dick and next time just leave them to get savaged by the thug?