This version of the vbulletin won't allow it. The board can be 'hacked' but only Bozza can access these hacks. I presume he recieved some sort of code number when he bought the board.
So for now nothing can be done untill Bozza has some more time on his hands and even then he doesn't have to...
I've sorted the problem with thread subscription. The default value should now be "no" dont send me emails in threads I have posted.
Its' more complicated than you might think.
:D
This should sort out thread subscription.. ish
Under your options:
Use 'Email Notification' by default?
Using this option emails you whenever someone replies to a thread that you have participated in.
Select no.
I kept getting emails each time everyone posted!
Should be okay now.