I've seen plenty of Skanky, whoops I mean Yankee, gear at Mariners games and haven't witnessed any hostility. What annoys me is anyone rooting obnoxiously for the other team. Come to think of it, rooting obnoxiously for any team. You know--screaming right in my ear or at inappropriate times, etc. Just be civilized yourself and people will respond good naturedly back.

BTW, I hope you have tickets already, cuz ya can't just walk up and buy them.

And you can't start a "NY versus Seattle thing" and then just say you're not so only you get to be insulting.