Earlier quoted context omitted.
"Lots of studies show that pretty people get further in life." [citation needed]
http://lmgtfy.com/?q=prettier+people+get+further+in+life You know, by saying "citation needed" what you actually say is "I don't really care for your opinion". If I wasn't so desperate to procrastinate, I should just ignore you. Why waste energy to educate you if you are obviously not interested in learning?
> by saying "citation needed" what you actually say is "I don't really care for your opinion".
You're saying "I don't care for your random opinion you could have pulled out of your ass with no correspondence to the real world, please demonstrate that you didn't just make that up."
When you make a claim that you want to be taken seriously, cite your source. It's not hard, and it's sure as hell not anyone else's job. If you don't cite a source, people will reasonably assume that you have none, and disregard what you're saying. That's fine if you don't care, but I repeat, if you want to be taken seriously, cite your source.
That job is yours and yours alone, for a couple of reasons.
Firstly, only you can cite your source because only you actually know what source you used.
Secondly, from a utilitarian efficiency perspective, if it takes X minutes to look up and post the source, then the total time spent when you cite your source is X, but if you don't, and everyone has to look it up themselves, the total time spent is X*n, where n is the number of people who read your post. For values of n greater than one, this is dumb. Do the sourcing once, to avoid duplication of effort.