In light of Verizon’s recent ‘fuck you’ to their customers, this 2005 piece from Michael Lopp provides a good contrast:
[I]n all of these years of usage, I’ve never received a single IM spam. Not a single one.
Does this mean that AIM is secure? That they haven’t shared my personal information with telemarketers? I don’t know. What I do know is that it’s been eight years and I still consider my AIM account to be an invaluable communication resource.