Ok, whenever someone creates an account, they should be made to read a list, like rules, on what not to do, and what to do. It would cut back on the amount of nooby suggestions i.e. more stickmen, magnets, moveable solids, lasers.

Heres a guide example:

Welcome to The Powder Toy offical website! Before you get started, you need to agree by these rules:

I will not post suggestion about [Inseart rejected elements here].
I will respect the mods and understand that their ruling is final.
I will not create spam threads/posts (Including advertising.)
I will not create more than one account to vote up on my creations.
I will keep all personal information private.
I will try my best to use correct spelling, to at least the point where my post are understandable.
I will contribute to the communitiy by posting saves that took me a decent amount of time and effot (i.e. no posting saves that are deliberatly not to an acceptable qualitiy standard.)
I will not beg for votes, or create vote promises.
I will be respectful to other players, even if they are not respectful towards me.
I will not beg to be a mod.
And most importantly, I will try my best to have fun!