Yep. I was watching a game in Belgium last year on a football tour. There was an ultra section behind the goal, so a few of us joined in. They ‘tolerated’ us until one of the lads got their phone out to video it, and then they forced us back out to the normal area where the rest of our lot were sitting. There was 40-50 of us, so we started our own ‘ultra’ section singing random chants. The folk sitting around us told us that the ultras wouldn’t like it, and true to their words, at the end of the game a few of them came over to us and instigated a small ‘scuffle’. It’s just weird behaviour.