It's well past time for getting rid of licenses that say "you can do what you like with this software", and replace them with licenses that allows you to sell as long as the original project gets a cut, without taking on any of the liability.
The idea that you just mark your work as MIT/GPL/CC0 may have made open source more popular, but it also ruins lives when that thing you worked on for years and never made you anything makes a random drive-by asshole more than your annual salary.