My daughter play tennis, and for last 1.5 years I record basic quality video of her competitions and we discuss errors after. It is improve her skill a lot. In 1 year she move from under 9 to under 12. it is look like upsets some people around.

Today in Christmas tournament I was prohibited to take video of my childe any more.

Any one was in that situation before?

It is public sport event, I record for coaching purposes , all parents and professionals do it all around the world as part of coaching. And i always do it at any events from basic kids tournaments to world champ/Olympics.
What wrong?

Thank you for any advice.