I've since heard this phrase a couple times in discussions on radio about the news reports and idiotorials.
You may have been the one to originate a very appropriate description of what is happening.
[blush] I don't pretend that I'm the only one to come up with the term. But if I did originate it, what the hey...
The referee was with the "personal foul" signal - that's exactly what "piling on" is - a personal foul.