Yeah it's a right PITA if you've got more important things to attend to.
You can chose to cancel it but it pops up a few times more and still needs cancelling before it will leave you in peace.

On a PC platform with Chrome it's very plain to see when you have messages so you can attend to them once other stuff is done......it's not like you haven't already been informed by email you have an EEVblog message.
IMHO SMF Message Popups = Fail !