We have disabled the signature feature due to it being abused by several users. When a user posts a 50k photo for their signature, for example, and 100 people open a thread that user has posted on, that is 5,000k of our bandwidth that is used. On top of that, if they post several times on a thread, that amount of bandwidth is significantly increased. Now imagine they have posted 1,000's of times. You can only imagine the bandwidth that is wasted.
On top of that, it is annoying and cumbersome to read a thread littered with signature photos.