What danger does having links in a post pose for a site?

[Min George]

I hear some sites don't allow people to post links on the site. It often sounds as if there is a real danger that putting links in posts cause to the site.

What are the risks or dangers that a link poses to a site? Are there any security risks with having links on a site?

 

[Laurentta]

Having links in a post can pose security risks for a site. Links can lead to malicious websites or download malware.