Well, I'm not much into "autoblogs", but here's my view.
There's nothing illegal, maybe slightly un-ethical. The autoblogs who "rip-off" content from article directories, forums, RSS feeds keep your resource boxes, backlinks and stuff intact (they have to, in case they don't THAT'S unethical to say the least). So, when they rip, they're actually benefiting you as well.
When the RSS feed thing was discussed in past, this thing was discussed as well. Not that I'm in favor or against autoblogging, but when one oneself is "kind of" giving away his content -- other people may use it with proper credits.
Build businesses, not quick money makers.