●They want their identity protected even if they're not giving information directly. ●Some people don't block users but ignore them instead when they see their username. ●They are worried about if their opinion could hurt the asker because it might counter his/her beliefs ●Trolling/Xper hunting/Time passing/low chances of getting blocked/lacking self confidence.
Usually it is because I telling a personal experience that is too embarrassing that I dont want it linked to my profile. if I had used another user name or just one of the default pictures I would not care, but this is really me.
And sure, you get trolls and such, but I think you should be allowed to use anon, sometimes I use it when I know what I want to say won't be received well, but it is my honest opinion.
I'm not sure eithe. I think I've only ever answered like one question anonymously. I always feel like if I am going to comment on something I'm not going to hide behind an anonymous tag. I wonder if many of them are the ones whom down vote comments without adding anything themselves.