If this is not allowed, whether it be direct links or sub links please post so in the rules if you will be closing threads with links to adult sites, thank you.
I brought it up in the staff room after closing your thread, it should be added soon. Thing is TFL consists of people of all ages and we need to consider the younger people on here.
We decided that adult content is to be allowed, so long as it is clearly marked as such, with a thread prefix like [ADULT CONTENT].
Threads containing adult material will still be moderated on an individual basis, so if it smells like spam or contains "extreme" material then of course even a thread prefix won't save it.