Some people like to put "tags" in the title within brackets. Like "[GLBSE] [ANNOUNCE] ASDF: Generic asset". I personally don't like this style. I prefer to include the tag info within the sentence, like "Announcing ASDF, a generic asset on GLBSE". When tags are really necessary, it may indicate that a new subforum should be created.
Personally, I find the bracket usage very helpful. As an investor that wants to keep up with recent news, scanning the "unread posts" list for "[GLBSE]" speeds things up. Bracket usage also helps me skip over threads that are just chatting.
Totally.
There are WAY too many securities, etc. to be able to easily find the one(s) I want (visually) ... the brackets are good. I like them too.