I'll add one!
Although I must admit I'am an offender of the "Udders" one! I didn't even realize, even though I know they have only one, just i throw an 'S' on the end.
Mine isn't too bad, but we have friends of my parents that used to keep their minis on our property. They came out every day and would constantly nit-pick at me about the horses, they were know it alls, but never owned horses till them minis.
They used to suggest ridiculous things such as breeding Willow with her foal ect, and it was constant, your opinion couldn't contribute.
One time they bought lucerne chaff and mixed it with grain and then ran out of storage for it, so they fed half a wheel barrow load of it between 4 minis in one hit, and my poor minis were in with their horses too, should have seen them the next day....
They also would bring like 4 loaves of bread and feed it to the horses, and I told them I didnt want my horses having any, then they would rave on about how they aren't on grain diets so it wont matter blah blah blah. And still fed them bread... So each horse got a loaf each...
I will end with one last one otherwise I will write a novel. One of my biggest arguments with them was about worming. They were telling me that I was wasting money and overloading them with wormer by giving them their dose every 6-8 weeks. They kept telling me it was twice a year.
They didnt budge even when I told them its the recommendation on the box, and its what the lady at the horse store told me AND the vet. They get the exact same paste as we do as well. And my sister even backed me up relating it to her dose for her dog and cat. Still stuck with their twice a year theory.
But thats all Ill say... Then they took their horses after 4 years (yes I had to cope with that EVERY DAY for 4 years) and they never said thank you, taking them without saying and leaving me worried sick thinking they escaped. Yay