I have started to get hits from a site calling my site a scam and some rather untrue discussion on the subject of my site, they also have started calling me rather harmful names. Just wondering is there is anything I can do to make them remove my url and take down the harmful content? Or can people just say what they like about your site?
It depends what they're saying - if they are saying something that you can prove is blatantly untrue then that's defamation and you can take legal steps. If they're saying something that is only their opinion then there's not much you can do - people are entitled to make their own observations.
they are saying some of the art work on my site is not mine.. but every thing on my website has been made by me and just been rather rude about me as a person
If you can prove, unequivocally, that the artwork is your own then they're defaming you and you can go down the legal route. If they have unequivocal evidence that it isn't your work, then they're not doing anything wrong. As for them being rude, that's just unlucky. I suggest you challenge them to prove it isn't your work - if you're being honest they'll not be able to do that and this will all die away.