[Request] A chat filter for friends logging on/off

[Aryea]

I have a friend who complains to me because I log in and out frequently between characters, and they are constantly seeing "[@Aryea] has logged on." and "[@Aryea] has logged off."

I don't want for him to have to unfriend me in order to not see the messages in his chat log. Would there be an easy way to filter those two lines of text out? This would be awesome!