There are many reasons, one person I know left because their spouse insisted they should not be on a site with porn, others have been harassed, some may be scared of laws about exposing who uses porn sites in various countries, sometimes people are displeased with policies of FA itself.

Wow, I didn't know there were so many unusual and even unpleasant reasons 0_o
It's a shame they can't stop blaming those people who like specific pictures; they're just pictures, that's all.
Thank you for your answer ^^

i had a break i had eye trouble but I live here