try these:
d) enjoy their anonymity
e) dont take the internet as serious business
f) too poor for a camera phone or digital cam
g) have nothing to prove/ simply dont give a fuck
I agree. If you post your pic, great, good to know what you look like. But if you wish to remain anonymous, that's your right too - there are heaps of people here who haven't posted pics but are great posters and we like them for their posting, rather than for the way they look. It's all about the quality of your posts here, not your real life profile.