Christopher Soghoian has an excellent suggestion
New rule: Instead of a stock photo of masked-man at a keyboard to show hackers, use the NSA director. More accurate. pic.twitter.com/DjziAmzptq
— Christopher Soghoian (@csoghoian) February 23, 2015
If that picture isn't scary enough for you, how about this one?
— Bernd Haug (@xaibeha) February 24, 2015