Has anyone over 18 ever won the poetry competition on Neopets or can they and should I even try is that not nice?

There is no age restriction on the Neopets poetry competition, meaning that anyone over the age of 18 can enter and has a chance of winning. Whether or not you should try is ultimately up to you, and whether you submit a poem is something you should decide if it is something you want to do and how you feel about potentially participating in a poetry competition.