It was 56 years old became obsessive compulsive spent my life savings on sex and sexual body rubs bought things I didn't need. My wife divorced because of this I became homeless and went to jail all because I wanted to deal with Parkinson's, I was on Selegeline, neupro patch 9 mg and 1620 / 100 Carbidopa levodopa that's why I asked if too much dopamine is bad for you I would say yes
Requip made me shop, be impulsive and compulsive. I think it's the dopamine agonist that causes those problems, not the sinamet.
You are right about it being the dopamine agonists -- e.g., Mirapex, etc.