Well we could do what my other league's commissioner decided to do without input from anyone else and just make forced substitutions on inactive teams. Needless to say this proved to be extraordinarily unpopular. 

Some kind of comedic shaming of the last place player is also a good way to go about discouraging the abandonment of their team. But I don't feel that would be right this year. Maybe it can be part of our next season's rules.

I like Punishment #2 in this video and would say we should adopt it if it were not for potential opsec issues:

https://www.youtube.com/shorts/HoU1_Nrhg3s