I think everyone has done it. Got some tool where they can send out hundreds of friend invites. It just isn’t worth the time you put into it. Most of the people that will accept your invite will be the kind of people that accept everyones invite and don’t even care about what your doing.
If you had 100 friends (or is it likes…) on Facebook that responded to every comment you put up that would be way better then having 1,000’s of friends with little to no interaction.
Social networking sites are about building a community. You need to figure out what your community wants to hear and deliver it in a personal way. No one wants to read facebook updates that sound like they are coming from some business. So be person and most importantly be entertaining.
This is also one of those areas you can hire someone else to do it. There might be a fan or friend that will do it for a few shirts.