I have the .co.uk for my main site, and I have now bought a whole load of extra ones like .info .org etc. Primarily to stop someone ripping off my site.

Is it best to redirect these urls to my .co.uk or leave them with a parked page?

I read somewhere that urls with a zero google rank that link to your site can pull you google rank down. I am not sure if this applies here though as this would be done through web forwarding.

Any thoughts?

Cheers