You cannot compare snakes with primates. Snakes are driven by instinct, not emotions. People can provide for a large snake as long as they take the necessary steps for protecting themselves, provide correct heating, space, and feeding. Its not rocket science.

Primates, however, are thinking, feeling, beings, with ideas of their own. A snake does not sit there and contimplate whether or not he likes you and whether or not he feels like attacking you because he's bored. (ok, well some of us have that one snake. ) A primate, if not cared for properly (even if he is) makes decisions, thinks about things ahead of time, and can be offended by you. They are not too far down the pole than we are. They are sad, happy, angry, depressed, excited, and have personalities all their own. They are like two year olds with fangs!

I don't think your average joe can support a primate both physically, financially, and mentally. You just can't provide the kind of stimulation he/she needs.

I think strict regulations need to be put into place. I think anyone considering a monkey for a pet (regardless of species) should have to go through a few years of in depth education, a few years of hands on experience (can be done at the same time) and have a home study done with a full inspection on the primate's to-be enclosure. Then and only then can the person be eligible for a permit. And even then, I think yearly or bi-yearly inspections need to be done to ensure the person is caring for the primate correctly. A lot of work, but it would help ensure the safety of the primates.