Poem Hunter Has Been H A C K E D

I got a message today from someone I had never heard of. This person thanked me for rating one of his/her poems. The problem is, I had never even read that poem, much less given it a rating. A similar thing happened to me about a year ago, and once more before that. I seldom bother to rate poems at all, and only do if I feel that the poem deserves a rating of five stars. I believe that someone, somehow, has hacked into Poem Hunter and can make it appear that he/she is someone else, leaving comments and/or giving ratings to poems.