For the record that didn't happen in Philadelphia it happened in Camden NJ which is across the river. Clearly a lot of people in attendance were from Philly but they were also from NJ and other surrounding areas. Also it happened at an Opie and Anthony event, so you can imagine what sort of crowd was there.

It's also notable that they stopped doing those events at all because booing of new comedians was a general problem everywhere.

Philly does have a lot of problems, but it annoys me that we have a reputation as particularly bad crowds at sporting events etc based on a few notable incidents. If you look at basically any other city where large crowds of drunk obnoxious people congregate they have similar incidents.