We are still actively working on the spam issue.
Comics
4chan has a lot of references to comics, in /co/ and elsewhere. Some regulars also make comics. This article is a list of webcomics with a message board view.
Current Web Comics
Dead Webcomics
Links
TopWebComics is ranking list of upvoted comics. There are no downvotes. The list is reset at the beginning of each month.
The Web Comics List is a list of the latest updated web comics. The software is severely broken and https links are never seen again.
The Belfry WebComics Index is another list with reviews.
Many of these have categories but the functionality is far from optimal. Some lists permit only a single category.