I was just thinking I'd love to be able to attach a message to friend requests, so the recipient would know who I was (my main or forum name), or why I was adding them.

I've checked, and there's room for a little 'i' (for info), button on the end next to the message button.

Funnily enough, this is the only time friend spam in town has been useful, I needed to have a friend request from an online player to check if there was room for a button