The reason I say so is that nearly every single one I've read has stated (sometimes repeatedly) what a fantastic time the person had playing the game, what a great group of people the player base are, that they will miss the game and that (in many cases) they hope to come back someday.
These messages are almost always positive about Arm, the world, the players, staff and the GDB. (sentiments that I echo wholeheartedly, by the way).
I rarely use the word deserve (mainly because it is massively overused), but do agree with Dar that people who have put years contributing to Armageddon and Zalanthas have earned the right to say goodbye and send their best wishes to those still in the world. We've all played many, many characters who died and never had a chance to say goodbye. Taking the chance to do so to the people who played the friends, enemies, bosses, employers, loved ones and templars who abused those characters seems very appropriate to my mind.