Now before I get a lot of hate from sellers I understand buyers are guilty of this as well.
My issue is mainly with using the buyer requests feature. I constantly get people responding trying to sell unrelated gigs or responding with form letter responses that again are unrelated. They also like to not put their not real price for the job either putting $5 or listing the price you listed only to later ask for more money when you contact them which is normally learned after spending time talking with them thinking the price was already settled and if I disclosed more information that could alter price that would be one thing but with most my listings the specifics of the job were already listed in black and white.