I generally understand and support the need for HA to manage the service they provide, and if avatars were "getting out of hand" then this definitely needs to be controlled. I do think that 6KB is pretty small, though. Maybe 10KB, instead?
And I'm not sure why off-site links are not desirable...it would seem to me this would be
more desirable from an adminitrative standpoint, as there is no server space taken except for the URL, and even my slow 56K connection has never had problems with any avatar I've seen, even my own bloated examples.

Maybe there is a bandwidth issue on HA's side I'm not understanding?
Anyway, Angelina is getting pretty claustrophobic at 3x4 pixels. I'll use a larger avatar after a final decision is made. (Though it'll have to be a different pic, because she's totally nude. (w00t) )
edit:Oh, I voted for "compromise" between old rules and the currently proposed changes.