I wouldn't call it exploiting; I'd call it 'harnessing public resources', since most of the information collected through this service from Facebook is supposedly public.

Also, how can you have a 'favorable reaction' to spam given that...

> If I ever get an email with my name from a company I've never given information to, I... delete that email.

I also agree that this is snooping. However, this is just a tool, and should be used responsibly. Abuse would make it reprehensible.