Well, I've made a handful of packets for SICK recently using scrapebox. Including using the blog commenting feature of scrapebox. The other night, while running my data cleaning scripts (replaces profile.php with register.php etc), I noticed a few questionable sites. I know these have to be in there from time to time, but my curiosity got the better of me and I started actively looking for them in the packet I'd just made (100 VB forums and 200 SMF). The good news is, they are pretty rare (only a handful accounting for 2-3% of the packet). The bad news is they can be the worst of the worst. Here are some examples (links not included): 1) Hate sites (Nazi, Skinhead, etc) 2) Child Pornography (yes, there was one of these in the mix) 3) Sites related to Terrorist organizations (Hezbollah/al jazeera etc) 4) Bloody Disgusting (autopsy/RL human gore etc) 5) There are a handful of others that rate much lower on my list such as fetish/porn etc. While I'm no prude, I was interested in a few things that came to mind when thinking about this. The SEO impact...any? One link here or there can hurt or it'd be pretty easy to harm the competition. How about the legal impact - aka using your own IP address (I don't use proxies in SICK) when signing up to these forums and dropping a link? I am interested to get others peoples take on "questionable" sites with your backlinks on them...what measures do you go through to avoid this? Is there any real reason (short of some moral obligation) to try and avoid these? Please mention your backlink volume when pointing out how you approach this issue. When you process 10k+ backlinks a month, is it really feasible to filter these?