Isn't that going to look like just about any one of those "Anti-virus" programs that pop up. "WARNING YOUR COMPUTER IS INFECTED, DOWNLOAD OUR PROGRAM NAAUUGHHH!" And then they turn into a virus themselves.
Even an email I could see being easily mistaken for a trap. Okay, even if they are not mistaken for traps, it will not be long until malware writers start making scripts to look like a comcast warning message.
I see this as a good idea, just not sure how well it will work in reality...
The early bird catches the worm, but the second mouse gets the cheese.
CPL:IA;ASEL/AMEL. CFI:ASE/AME; IA