How recent was this? It definitely used to be the case, big time. I think tumblr's can get like that... LJ, I dunno.

But I'm also talking less about Harry Potter fandom spaces and more multifandom spaces, as well as spaces that aren't fandom related at all, where Harry Potter's brought up. For instance, I don't know if you read fandomsecrets, but if someone mentions Harry Potter there, that's pretty much the response you get. ("Pssh, Harry Potter Harry Schmotter." "SHE KILLED MY FAVORITE CHARACTERS!" etc.) Or those articles on facebook that "tag" the Harry Potter interest.