Chainshipping
Yet another obsessive fangirl base. Chainshipping is the nickname given to (usually) teenage girls who have watched the film Saw and feel that Adam and Lawrence should be lovers. They have infected most fanfic/message boards for the Saw films with their smut. However, they are one of the better yaoi enthusiasts, since they don't seem to force their opinion on others.
You can always tell which ones are into chainshipping, 16, female and Leigh Whannell obsessed.