Michael Lohan: Kate Major is Stalking Me!

Michael Lohan is scoffing at ex-girlfriend Kate Major's allegations that he made wild threats against her and her family, claiming she's become more obsessed than a pack of Lady Gaga's little monsters.

Michael says she constantly calls him, "finds him" in various places -- despite filing a request for a protective order against him last week.

As far as Kate's claim that he secretly taped the two of them having sex, Michael tells TMZ ... yes, he did tape their sexual liaisons, but only because he felt it was necessary to prove she was a willing participant.