Drugs ruined a working arrangement I enjoyed for 20 years.
He was a landscaper and would do everything under 10 ft tall for my customers: stump grinding, topsoil and seeding, mulching, garden installation, shrubs and flowers, grading, lawns, swales, irrigation, etc.
I would do everything over ten feet tall for his customers: trees.
End of each month we'd compare the list of the work and tally up the money, and simply hand one or the other the difference in cash.
My work changed a bit and I was not selling much landscaping as the trees alone were keeping me busy.
We had been close enough friends that he and his wife named his first son after me. He was always mild-mannered and polite and had a great rapport with customers.
Over the last year we worked together I'd see him less and less, but the work got done, so I didn't think much of it. Figured his life just got busy.
Toward the end he came by saying he was behind on his mortgage, no jobs, etc. So I said throw in with my crew and let's catch up on the backlog of tree work.
I paid his crew, and threw the funds his way to help him out. The next month it was the same sorry story... and then I find out his wife is leaving him due to drugs. He had cleaned out their savings. At that point I am out over $6k. This was long enough ago that that was a lot of money. I ended the work agreement.
And, on top of that a month or two later several of his customers called asking why I had not done their trees yet. I said I had stopped working with him as of months prior, and did they know he was having some serious issues. When they said that he asked for the money in advance, I recommended they call him and/or their lawyer. I went to his place and he was a bit out of it, not even apologetic, and actually a bit rude. I took a brand new OG 372XP, a beat up but useable commercial Honda mower, and a Husky concrete saw as a start of his repaying me.
Changed his number, moved, never heard from him again, except he did send his younger son by to ask to borrow the concrete saw. I laughed and told him I was sorry but it was sold to pay his dad's debts.
Saw his sister a few years back who said he had talked his mom into signing over her retirement accounts so he could 'take care of her'; screwed the other kids out of any inheritance.
Drugs are something I have seen destroy lives first hand. It has kept me away from even being curious.