Just kind of a thought on "Danger" and especially phony "Venomous" signs . . .
In the event of a fire, Danger signs are more likely to get snakes killed. Maybe I'm weirdly skewed living with a fireman, but a lot them seem want to bring stuff out if it's alive (or was recently alive) and the place is burning. Turnouts are thick as heck, and a surprising number of guys are willing to take bites, including from large dogs, on them. A warning may well put the kibosh on any rescue attempt of an otherwise harmless snake.
Other than that, after security layers (and . . . OMG, Pit!!), I think avoiding letting slip that one has snakes at all is one of the best things anybody can do for their collection. I even worry about classifieds services that require me to list my full name and the name of my nearest town. But I'm very paranoid.
If the worst happens and snakes are stolen, it may help to have detailed photos (saved where they cannot also be stolen) of each animal, so that they may be identified later. Indeed, if there is a "later."