Of course everyone's welcome to submit prompts, but exercise a little courtesy for heaven's sake. If you don't write and ask for prompts (or if your prompt-to-fill ratio is incredibly uneven while favoring the prompt side), then it's only courteous to not request too many. Wait a few weeks to see if your first prompt gets any fills before requesting another. It's disingenuous to think that over-saturating the meme with prompts is harmless, because it's not -- people who don't spam prompts have their prompts buried by people who don't invest that much in either the prompts they're submitting or in contributing to the fills, and people who archive this whole thing have a harder time keeping track of the meme.
Re: I hate to be that guy, but........