Ok, downvoting does exists and it sucks, no doubt about it. But here are a few things the marjority here is not even considering:
If your avatar score dropped, have you ever stop to think that it might be because it really isn't THAT good afterall and not because evil noobs are targeting you?!
I'm not generalizing things here, just pointing out something that happends a lot, but many of the users who complain about being downvoted might have recieved the low votes because they actually deserved it.
When we create something (in this case, the avie) we sometimes fail to see the flaws in it. We believe that because we think it's good, everybody else must think the same, and that is not always true.
So, once again, I know downvoting exists and I hate it too, but sometimes the down votes we get are just real wink