[giantg2]

I work for a large enterprise. We have similar issues with people not following company policies, including the people who's job it is to know those policies - the managers.

The best approach I've found so far is to act dumb and ask for the policy documentation so you can "improve" yourself. On your next commit, try to work on a piece of code with lots of violations by others and correct their "tech debt" to be consistent with the policies. Act naive and helpful. This should hopefully seed the idea in the other person that there are existing problems and you just want to help. Ideas are always more powerful when we think we came up with them ourself.