An issue I have with imageboards is that use of images invites low-effort posting because it makes it easy to be as annoying as possible, whereas with pure text making inflammatory remarks at least takes some forethought, and it invites unique forms of creative writing.
Anonymous textboards I think have the best forms of banter, but they're dying out these days. Over here people have incentives to appease others by gathering upvotes, so they feign this type of altruism that keeps them from being too inflammatory and makes them resort to stupid shit like tone indicators instead of being clever enough to write it that way.