Am I completely mad?

[Lockhouse]

You are indeed not alone. I do exactly the same with the other contractor who sits opposite me. We're on Mindalign IM. We codify names so if the channel gets monitored no-one knows who we are talking about.

We have amongst others:

Stan & Ollie
Chris Evans
Appletise
My best mate
Jack Palance
1-hung
Kyle Hawk
Miss Kitka
Moe (his office is called Moe's Tavern).
etc