I wouldn't be too worried about that sort of shit, at worst you'd be asked to stop linking too it. The only time this shit ever happens is when some hacker group REFUSES to remove a link to DECES DVD ripper hosted elsewhere or some other shit where the person sueing has a big cashbook and to many lawyers.
Link to whatever you want except the child stuff and you'll be fine, although best to stay away from beasty stuff too, my New Zealand GOVT found out what sites I ran and I had a link to a beast site and the prick checked my site and told me to remove the link right away. I said "oops sorry wasn't me it was one of our advertisers, we give him access to upload new banners each day and he uploaded a beast banner" he bought it, as they ALL do
(No I don't link to beast stuff anymore, but I did when it was bringing in 5 figuires a month, i'm not stupid ya know heh)
Sammy