The 30 Rock star is a big fan of the social networking site and often gets into heated debates with fellow users, but on Tuesday (20Mar12), Baldwin revealed he has been having trouble with one particular follower.
The actor claims the user has been sending negative messages to his partner, Hilaria Thomas, and he urged fans to flood the nasty follower's page with criticisms.
In a series of posts, he writes, ""I have some wonderful, fully engaged and, sometimes critical people that I encounter here.
""Some of them, very few in fact, cross a line and, for example, attack my relationship with my daughter.
""One person, however, has really gone too far. That person... has entered the Twitter-verse only to harass my girlfriend.
""Harass in a way that is borderline threatening. I want you to go to her address, and read just a few of her posts, and give her your notice of her behaviour.""