Man, if I were you I wouldn't gave that lady my 2 cents. I don't let anyone like that bother me, I've had too many weird/arrogant/stupid boarders come to our barn and try to run it the way they think is right. They just get kicked out or ignored.
The most crazy boarder we had was this family who had a shetland pony, a NSH, and some other horse that she'd say was a different breed every other week. They'd come once a week, and they'd demand that they have the whole arena to themselves for the whole day. They'd always run around trying to correct others on their riding or whatever. The lady would yell at the managers kids, even though she let her kids play in the middle of the road and even in the manure pile (lmbo). The lady thought she was the best rider ever, but let's just say it was quite a show watching her ride her mystery horse, to the point where we'd all stand around the arena wall and watch her. It was funny.
The worst part was that the lady's husband, a more than likely 250lb. Man give or take, rode their shetland pony and JUMPED him constantly. Their horses coliced a lot because they would leave them in their stalls with no water after they rode them for hours. And she'd yell at us when we'd try to give them water, or if we gave them banamine to help them!
She'd tell us to leave them where they were with no water or food. They wouldn't clip the pony either, so he would colic from the heat. I'm just glad to say our BO finally kicked them out!