I’d mostly like to keep them to a few posts so the actual discussion posts won’t get lost. At the moment the idea is people can post that sort of thing in the pinned introduction post, but I am thinking of something along the lines of themed picture posts in the future.

There are plenty of groups which have primarily photos, you are free to join those if that is what you are after. This group is for discussions, if that is not what you are after feel free not to join.