Can you suppress the name change alert from strange weapons?
I find that popup pretty distracting and to be honest, I don't care much that somebody has gotten 100 kills total.
Is there a way to block the message, without completely blocking other messages in the same style (gifts getting given out etc)?
You can disable it in Adv. Options by unchecking "Show pop-up alerts while in-game (e.g. trade requests)".
Note: This also disables the notification of trade requests.
You can disable it but it will also disable all other similar notifications suckh as when some one trades with you.