For bigger networks, I always went with 10.0.0.0/8 for endpoints, 172.16.0.0/12 for servers and other back-end services, leaving 192.168.0.0/16 for smaller networks like OOB IPMI (eg HP iLO, Dell iDrac) services, cluster heartbeat connections, and certain DMZ segments.

I think we need to address this not just at individuals or corporations, but at nation states in which those individuals reside and are licensed.
We need to kick them in the wallet. Allowing rampant pollution? Extra trade tariffs, and exclusion from various international groups/events. Complicit in rampant pollution? Punitive economic Sanctions, and loss of access to certain technologies, financial networks, etc.