How anonymous can give links?

This isn't possible with relatedlinks as-is; you can give anonymous users permission to add related links but they won't get to see the form unless they also have permission to edit the node in question.

However even if it was possible I don't believe it would be desirable without adding some kind of strenuous spam-catching device (CAPTCHA?) and/or a moderation queue for the related links. Otherwise you'd just get some spambot coming along and adding six thousand links to WoW gold-farming services or industrial drills.

If you're really keen to give anonymous users the ability to add their own links to your site, have you considered the Comment module? It ships as standard with drupal and I think it even has moderation built-in.

Thanks for the reply..

Yes I will use spam protection for this.

Can you tell me how to do that using Comment module?

But captcha can be added to almost any page and form so it wouldn't be hard.

use case:
I would like to allow anonymous users to add links on our club page and then rate them.

thanks
Chris