Anyone else seeing this? I belong to a number of different forums and this is the first time anything like this has ever happened.
Several people have had these PM's - we know about it and have removed the cause. If you look around the forums, you will see several other posts about this. If it's never happened to you before, all I can say is that you've been lucky...
Meanwhile, please accept our apologies - we are actively investigating ways of minimising this sort of unwanted and unwarranted intrusion.