I would find this a valid point to really put your foot down.
I personally am not a pushy person. I hate conflict and rarely ever force my way or opinion on anyone. Yet one time I was boarding at someone's property and they had told someone who was not horse savvy that they could bring their newly bought stud to the stables and place it in a pen with a 2.5 foot tall fence.
It was spring, my friend's mare was in season and was being currently kept with my gelding, and another mare on the facility was about to drop a foal. In short, I raised hell. Soon as I heard the stud calling out of the trailer when they drove up I went into protection mode. There was no way the stud was not going to jump that small fence with the four mares on the property in season. My gelding was the only male and I was worried for his safety, the mares safety and the foal who shared a fence line with him
In the end I managed to convince everything that it was a horrible idea and the people had to load the horse back onto the trailer and leave.