There is nothing wrong with smashing the glutes. Use a bigger and softer ball if necessary. When doing it in a controlled and smart way and making sure you are avoiding things that feel numb, tingly, or burning you are safe to roll around as you choose. Many times we find people just want to say something different to get traffic to themselves by saying someone else is wrong and I am right. It is all context specific. BASL has clear guidelines for mobilizing yourself and making sure you don’t do anything that you don’t feel personally comfortable doing. Be smart, be safe, and above all, don’t be afraid to seek out professional help near you if you feel you aren’t getting something.