My favorite are the developers that promise a certain percentage of affordable housing in their high dollar developments, but never ever come close to that and never get penalized later.
Or could be even easier to show that the lack of said units led to displacement for actual families.
I'm not saying it's easy peasy but if affordable unit advocates believe they are important then logically enforcing the regulations they fought for shouldn't be just shrugged off, at least as a signal to cities and developers.