I have been working on ProbableFollow.com for a couple months now and recently it is starting to gain speed.  I really want to help it along by talking with those people who make the claims:

If you follow me, I'll follow back

or

I always follow back

I want to engage these people, because they are the people who need to be called out or who would benefit from using Probable Follow.  They are essentially, exactly who I built the site for. The problem is that I do not want to spam these people or send out hundreds of the same message to everyone with a keyword.  Not only is it annoying, it could get my account kicked off Twitter. My question to you is: How would you go about engaging these people?