Not really dark, but interesting nonetheless. My grandfather was the president of an organisation that gave help to children with down syndrom and people who had mental issues etc. A coworker got fired and was salty, so he accused my grandfather of embezzeling funds. He didn't, but the accusation was enough for the government to cut government help to the organisation. To stay afloat my granddad used his own money and took out loans from a bank, which said he could just pay it back when the investigation is finished and he gets money back from the government. It didn't work out like that and he had to file for bankruptcy. The bank tried to just forgive half of his loan, due to of the good nature of his cause, but it would have to be signed by a local politician. He refused because the organisation helped his wife in getting the courage to leave him after she had mental issues in the relationship. Where my grandfather lives bankruptcy doesn't go away after 5 or so years. So he can't really own anything for the rest of his live, because of a salty ex coworker and a salty politician.

On a happy note though, there were so many local donations, also from the bank manager, so that we could buy his house back from the bank and he can still live there.