I don't like the 'you suck' chants. I don't join in on them. As Tri and DevsMan said, they come off like drunken college stuff, and it's just not my kind of thing. I too cringe when I hear it after we turn a 4-0 score to a 4-1 score, and I'm not a fan of the 'Rangers suck/Flyers Swallow' chant either. Again, not my thing. I'm there for the game.
But I think it's ridiculous to say the rest of the crowd can't chant what they want because of how it looks to other fans. Honestly, who gives a crap what fans of other teams think? Half the damn league thinks there are 1,500 of us napping in an empty arena while our team plays the trap all night. Even after how loud our arena was in 95 (chanting Bettman sucks), or leading the league in scoring in 2001, or shaking the CAA so bad in 2003 that the cameras on the second level were useless, or packing the house for the 2012 run when on paper we had no business outside of the first round, we still have the same empty arena/boring team stigma. I'm not interested in what other teams think of us. They will always believe what they want to, and in reality, the other 29 teams care as little about what happens in our arena as we care what happens in theirs.
For example, none of us cares that Nashville does a 'you suck' chant. We didn't care when the Isles did it. And we surely don't think that Chicago and Detroit, who often chant that each other sucks no matter who they are playing, have inferiority complexes. I think it's a far deeper inferiority complex to worry what the hell some dunce in a Flyers jersey who somehow drunkenly made it up the turnpike thinks of what our fans chant. At the end of the day, it's a sporting event, and being a fan doesn't mean you have to be logical. People are there for the "us vs them" of it all. Even with the chants, I'd rather have RR pt 2 than some generic song like Zombie Nation. I'll just cheer and yell the 'hey' part like always.