@abge: I get what you mean, and don't want to get hyper-sensitive about links off site really. I don't really worry much about the idea that people will post accusations in links off site and disguise them as NSFW links, and like you in clearly marked threads I'm not even too worried about porn links.
But I also wouldn't want people to take such a decision as a green light and start posting links to things to try and shock people. I know people don't have to click the links, and I'm sure not going to be following anything looking suspect, but I can just imagine it getting blown out of proportion and people trying to aim these things specifically at kids, trick people into following, etc, etc.
I'm starting to lean a bit against having hard & fast rules, because there seems to be some with a mentality of taking the rules and quickly figuring out the most provocative thing they can do while still following the rules.
I'd rather post some general do's and don'ts, and have the mods or people involved come to me about tricky cases.
I don't want a forum where you can't post any links but you can post death threats or ASCII art of porno etc, because of a specific interpretation of the rules, I'd rather people follow common sense because everyone knows there's a line and most know when they're crossing it.
People here are smarter than needing everything to be spelt out in rules, and we have a great mod team who will ask when in doubt and great decision review process for any abuses, and if the community disagrees with a stance on the forum I'll always listen to debate