like for instance i have a blog about celebrites and i site the url where i got the information. my site is clean, no foul language, and all my photos are safe for work. the url i link to is questionable...is this againt TOS?
I think its better not to keep any relationship with the questionable sites.Coz when google will find that you have some exchange of link with some questionable sites and visitors are driving from there , it could create some problem.
If we're being pedantic here, as the old ladies at Google often are, then a link to questionable material would be considered questionable in its own right. So I suspect the answer is yes, it is against the TOS. Let's put it this way - would I be willing to gamble my AdSense account on the price of a sidebar link? NO WAY!