No offense but I don't get some of you producers. Unless the person is making any sort of $$ from your productions, you shouldn't worry about it. That's just my opinion. If I were you, I would take that as a compliment. Someone loved your beat enough to "steal" it and put it out there! That's free promotion! Smile and tell the "non-serious" artist to give you credit for the beat.
I purposely put free downloads on my website so people can "steal" them, record to them, put them on youtube and send promotion rolling my way. I have a special youtube channel dedicated to those type of people. I have people coming to me saying they're my fan because they heard "insert random artist's name" on my beat! C'mon producers! Lighten up!
If they're making money off of your music, you should definitely take it seriously though.
