Not just hovering ................
It's performing 3 D maneuvers over the runway while others are in the pattern. If you have 6 pilot stations, and 5 are trying to fly their expensive aircraft safely, and one discourteous dummy blocks the runway or is flying against the traffic, then it's not only very annoying, but it's a threat.
I can remember a few years back, when I traveled all the way from Tucson to northern Colorado, to participate in a Big Bird Fly-In. At one time during the event there was 3 IMAC types hovering over the center of the runway, while the CD remained oblivious to the impact on the remaining people flying. The 3 who were doing the hovering thought that it was funny and great sport, others did not. I will never try to fly my warbird at Fort Collins Colorado again.
If nothing else, an awareness must be created, and some kind of guidelines must be put in place for CD's to use. Stupidity cannot be allowed to continue.
Jim