The only problem is with getting the dogpile to actually happen.

The cult of rugged individualism has made it almost certain you will be acting alone while everybody else watches.
Just look at the number of times you see it in the news. People murdered while a crowd of their fellow humans stand around refusing to get involved and thinking it is not their problem.
Then after it is all over they all complain about how such a thing can happen without anybody trying to stop it.

This is why I say there is no such thing as an innocent bystander.

At least the bikers understand the one on all and all on one principle.