D'oh. Should have thought of checking icon names.
This sort of reminds me of when I used to run a forum on another system yonks ago. Oodles of icons. Most people never knew or cared what they meant. I found that if I got rid of most of them, everyone was just as happy and restyling things was easier.
I think this sort of thing is a leftover from early forum days, when people were excited about being able to put things online and thought the more information, the better. Gets a bit TMI sometimes. There's a lot to be said for stripping things back a bit.