Windows Live Messenger, IE and Hotmail

Here’s something that’s been winding me up for ages. Whenever I access my Hotmail account through Internet Explorer, it launches Windows Live Messenger. I spend half my day shutting it down in my system tray.

Finally have found out how to turn the blooming thing off – it turns out it is not something you can do through Messenger options at all:
http://www.winvistatips.com/w7-stop-windows-live-messenger-autolaunching-t810520.html

To my mind this is poor usability – isn’t the ‘Hotmail launches Messenger’ option something you’d expect to either be in Hotmail or Messenger?