why not? it's cool that GP has become sort of the ultimate online source-book for rock and roll related art...but at the same time, has shitty flyers too. i'd always side on the inclusive side of things, and not make clay or anyone else have to censor content just because it was unimaginative or lazy. that seems silly.
i don't think this site was ever inteded to be an archive for just "professionally designed and screenprinted" posters. in fact, the majority of posters/flyers you'll see on the streets and in record stores have a lot more in common with this poster than the last Emek, or whoever.