It sounds like an oxymoron, but these are worth checking out (and possibly putting them around your office as opposed to boring modern ones. :))
I like the virus one, but I disagree with the one on social networks.
I found the posters at the Apartment Therapy site and they have a link to the original site by Steve Thomas here.
Smart People I Know 
It would be nice to link to the original artist…it’s
You are right! I almost always do that, but I got distracted when I posted this and forgot. If you check now, the links are there.