I'm developing a site that is adding new features every day. It's a non-profit site, so it's done purely out of fun. In light of that, since we're putting so much work into it we decided we should try and let other people enjoy it as well (which is why we're making it..)

I know recommend-it, and other things like it actually work. However, I dont know how well they work and Im not sure of the risks of using it.

My main concern is that some lamer will find my site, see the Recommend-It! service and spam someone, or send it to emails of large buisnesses, etc.
I don't want to risk getting a bad reputation, or kicked from my host just because some loser decided to have a little "fun".

Does anyone here use this or a similar service? Have you had any problems?

Any help and feedback is appreciated!