Scamming taxi drivers

Recently there was a thread in the philadelphia sub about taxis being cheaper than uber/lyft nowadays from the airport, which I have also found to be true.

But you still need to be on your toes as many times recently they have tried to scam me hoping I wouldn't know the better.

This one I just had was particularly aggressive and rude too. Guy tried the usual scam of charging me the center city flat fee when I was going to south philly and I know it's cheaper. Even told him not going far into south philly before I got in. Also confirmed credit card machine works before getting in which he didnt seem pleased about but reluctantly said yes. While on the platt bridge he tries getting me to pay the flat fee. Told him it should be metered. He was upset I knew the difference and started just yelling "why not take an uber then" over and over. Was also pretty upset when I saved him from turning left onto 76 instead of going straight into SP.

It just sucks cause other people either won't know they are being scammed or might not want any conflict and just accept it instead of making him change it during the ride.