Not if you want to be. Although, I guess I can already make out from their discussion that the Kongregate community isn't as "tightly-knit" as the one here on AG.
i was reading then i saw they are like "well were a more mature and tight knit community" then the next page "typical fanboy response" and then it went way off topic to "XBX 360 is best!!!!! whoo!!!!!!11!!1"
Who cares what another community is saying about ours? Or rather, should you care what they are saying? No. It is two sites with flash games, we both have a forum and we both have our user base. Rivalry might be logical (about as much as boys from one school fighting boys from another school because they are not from the same school), but that is how it goes. So, don't let you be bothered by them, and rather have them "discuss" AG on their own forums than they try to discuss it here.