I remember Agassi getting bad press because he wore bright colors and long hair.
I think if you go to somebody's house as a guest, you should follow their rules. More premeditated stuff - like what you wear ie Agassi.
A tiny happy dance - sort of brimming from happiness - shouldn't be frowned on. I'm not sure who the dance originator proctor is at Wimbledon, and I wonder how often he clocks in.
I do think, however, that there is a bit of character involved in how you conduct yourself as a guest. If I say "don't smoke or put your feet on the coffee table" in a pre-visit brochure for guests in my home, decency requires that you decline the invite, abide my requests, or be quite rude.
Again, this relates to pre-selected behaviors, not "crimes of passion."
At the end of the day, Gabby's hair, Serena's dance, and so much more of this equates too many people called journalists. Thin the herd. Maybe the survivors will be too busy writing about actual news.