Paranoia- inducing signatures
I worked for an organization that required your basic "I am not a contracting officer... You cannot construe anything in this email as a constructive change or commitment..." signature. Written by lawyers, the sigs were generally longer than our emails.
A few users were observed to have terse, cryptic signatures when communicating with each other. OMG! Non-conformists! Spies! Traitors! Bag biters! Call the authorities!!!!
Turns out they were playing multiple simultaneous games of chess.
Only the nails that stand up get hammered flat.