DH is security obsessed focused but is driving me batty.
Things we must not do as they are not safe:
Get a cat flap in case someone climbs through to burgle us / fishes for keys (kept in another room)
Open windows
Having beaten him down - we may now open windows on the proviso that they are not open too much or left unattended (e.g. must close and lock if I ever nip to the corner shop even)
Must not open the front door even if I'm in the house - someone might sneak past me and burgle us 
Must not open landing window too wide at night in case someone climbs up a ladder and we don't wake up
Must not open too many windows or doors at once in case a door slams and is damaged
We live in a naice semi-rural neighbourhood!
AIBU to throw open every window and door and torture him with this?