bill - 2:31 am on Mar 12, 2013 (gmt 0)
I'm not sure how that would be a big problem unless you were auto-following back the auto-followers.
Accounts that auto-follow based on keywords sounds like a very quick way to develop a somewhat-focused list. It's a lot more work to do that manually. You can't expect those poor marketers to do all that manual labor. ;)