Does Anybody Know If You Block Someone From Contacting You Does That Mean They Can't Rate Your Stuff?

Blocking only prevents the private messages they send you from reaching your account. It does not block them from any other behavior on Fanpop.

it doesnt prevent rating (seeee how the new system is a good idea now?) or commenting BUT you can report the user should they write offensive comments. in answers or forums you can report the response directly or if its on one of your images, videos etc
copy and paste the url into the notes section when reporting the user. this way the f4 can be alerted to the persons behaviour. if they misbehave the f4 can warn them or if they REALLY misbehave ban them.
normally its best to just ignore weird people on the net. if they do get really creepy though you can always contact the f4. dont try to make matters into your own hands.

block
link
and report
link