Heyy everyone

I was thinking: there are several people who have ideas for RP's, but don't want to GM it. I know it's not only me, because I have seen others posting it and talking about it. Or maybe you just have a theme in mind that nobody makes a roleplay about.
Why don't we sum up those ideas and maybe someone does it, finds it interesting and uses it to make a roleplay where you can take part in? 
I don't know if there would be a lot of ideas and a lot of people to use those ideas, but why not give it a try?