hmm maybe I don't have the best suggestion, but there was people like that at the pony club I was at, and well I set them straight! I stood up for my self and the others that they were picking on, and well im past the pony club grades so I am nt in it anymore, but it did help! But the people I had to stand up to were the instructors, not other riders. So I was pretty brave. Also a bit of a trouble maker, ha ha but I wasnt going to jsut sit there and let them do what they weredoing. Obvisouly the situation was different, and the only thing I can actually remember about pony club is how much I actually hated pony club!
Ummm so try ignoreing them first, if it doesnt work, I would honestly have a go at them infront of other people so everyone else can see, and then they will get embarassed!
Probly not best to do what I did straight away though!!
When you mix training and dedication your called... a professional
When you mix compassion and caring your called... a friend
When you mix bravery and selflessness your called... a hero
When you mix all three your called... A FIREFIGHTER!