This might sound like a weird suggestion, but would it possible to implement a way to add a tag along the lines of <highlight user="partman">? It may not sound that useful, except most of the things that would rely on this (Uno, for one) already have client-side implementations. The main use-case I have this for is Chess games - I'd like to be able to ping a specific user to notify them of their turn without spamming chat, but couldn't find one. I currently use PMs, but constantly switching is not an enjoyable experience. I can understand if this gets rejected, but I thought I'd put this out here.