Your workers get exposed to it, and they bring it home to their families on their clothes and shoes.

I fired an owner a couple years ago (for many reasons) that flipped out because the tenant had clothes scattered around the bedroom floor! 

The building is a former haberdasher/clothing store with 1900 charm.

I'd just leave it be unless you feel it's a safety hazard for fires having a garage full of flamable junk or an invitation for mice to breed and habitat in countless boxes of old smelly clothes that they'll never wear again. 

Is it a homeless guy or druggie with a garbage bag full of clothes?

We went to the place unexpectedly and found clothing and stuff there.

Then there is the one who hasn't bathed in a week and wears the same clothes every day.

Corning is small with a few Business Jack-in-the-Box,McDonald’s Burger King, Taco Bell,Denny’s small business is Daisy’s ice cream and yes a donut shop that has its costumers,a few cloth stores that are barely getting by and My father owned a restaurant in Corning sadly lasted 10 years so he had to sell it but he still owns three other buildings a salon that my sister runs a real estate agency and now an empty building.

It’s common sense but some folks would rather spend that money each month on cigarettes and booze clothes eating out nikes etc, .

Also, they cost about $17 each vs about 50 cents for a normal receptacle.If this were my rental, I would only consider rewiring if the wire was old enough to be cloth covered.