All I'll say is be careful. Everyone says Philly fans are bad, they have nothing on the some of the idiots in Baltimore. I actually work with a guy who's proud to act like a thug towards fans of the visiting team. Not all are bad, but a lot wanted to provoke us for no reason than being Steeler fans. I guess it didn't help that the Steelers kicked their butt that night!
The majority of Baltimore fans are pretty good. But there are a lot of bad sports fans in Baltimore in general. Not just the Ravens. I went to a Yankee-Orioles game at Camden Yards and, of course, there were more Yankee fans than Orioles fans. A bunch of idiots outside the ballpark picked a fight with every Yankees fan they could find.
That said, Ravens fans aren't as bad as Philly fans. Seems like the majority of Philly fans want to start ####. You don't hear of Ravens fans going to Pittsburgh for the sole intention of starting as many fights in the stadium as they can.
You probably caught #### because you were a Steelers fan. In general, Ravens fans don't get their feathers fluffed unless they're playing the Steelers or the Bengals. And everyone hates the Yankees so,
. I'm not excusing the behavior you witnessed, but it's not like Steelers fans don't ever stir up problems.