An alternative for bar owners is to refill some of the empties with *methanol* (wood) alcohol, making absolutely sure that workers never give any to paying customers.
Then if burglars steal some, throw away the rest and erase any trace of it being there.
https://en.wikipedia.org/wiki/Methanol_toxicity
That would be poisoning them.
Lead is simpler with fewer repercussions.
That's what some car owners in Johannesburg do. They leave a pint of something like Jack Daniels in the glove box laced with methanol or even something more lethal.
The thief steals or robs the car they always check the glove box.
When the thief croaks the owner just denies the pint is his and there is no way to prove otherwise. Makes thievery a more risky occupation.