There is nothing different about going to an Eagles game at the Link then there is about going to any other teams stadium. Act accordingly and you will be fine, act like a dope and you will get harrassed. For every story you've heard about Philly fans there is a similar story about another teams fans as there are idiot fans everywhere not just Philly.
I went to two Bills games at the Vet wearing Bills gear and sat in the 700 level with Dallas fans and there were no issues because we all knew how to act.
The 3 games I was planning on attending this year were the Eagles, Cowboys, and Redskins games...what are the odds those 3 games would be in a row in December?