Endchan gets attacked quite regularly by the pedo spammer, we just have to stay vigilant and delete as quickly as possible.

That said, these aren't posting such eye scarring content as yet. The question is, does the admin want to allow their presence into his community? The simple solution is just to keep deleting their content until they get bored and go away.

Be warned, creating a board for them will attract others and illegal content will get posted. 8chan managed it but only by having a terrific moderation team to keep them in line.