Seen in my travels...
When you want to keep your office ladder where it belongs you lock it up, right. A sturdy bicycle lock should do the trick. Smart.
In fact, you might want to keep the bicycle lock attached to the ladder so you can lock it up wherever you happen to be using it. Oh, very smart!
Electrical conduit in the maintenance closet makes a sturdy anchor. Nobody is going to risk getting electrocuted sawing through electrical conduit to steal a crummy ladder. Wow, very, very smart!!
And, we'll attach the lock to the conduit with velcro in case we lose the key... (Blammmmmpppp!) FAIL.