My understanding is that renter's insurance covers their items and gets you off the hook if someone falls on the property that they are renting, or if they negligently left a pot on the stove and the kitchen burned - their fault, their insurance not you.  

And because you are on a fixed income (social security, or any government help) the additional money can go for buying some pot or even something better.Your dead beat friends start doing it and soon the whole community stops working and starts playing this game.

However, this is a problem tenant and I don't want to stir the pot with him. 

Secret pot garden in the closet maybe?  

Nothing major - a fun-colored pot, dish towels, a bowl of colorful fruit and flowers in the kitchen; a shower curtain and towels in the bathroom; etc.

Turns out it's a South Asian tenant, whose wife likes to home cook, frequently making lentil soup.

a landlord can prohibit renters from growing pot by including the rule as a clause in the lease.

But I see other seniors in my building with gambling problems (lots of Indian casinos around here), who smoke cigarettes and/or pot, who spend their money at the local bar, going out to eat, buying new clothes, etc.  

Great topic, and yes, screen him, you don't want to find him cooking meth in the bathroom...

It is like having a bunch of strangers having the power to interfere with your investment.And then there are the board members who decide it's their mission in life to harass owners/tenants about every weird thing, like potted plants on the balcony or whatever.I only bought the one condo, intending to keep it forever and rent it out.