I've had the most luck with OISD as the blocklist; others have the exact problems you describe (in fact all other blocklists I've tested have had frequent issue

I've had the most luck with OISD as the blocklist; others have the exact problems you describe (in fact all other blocklists I've tested have had frequent issues). Since changing, I've had maybe 2 sites that didn't play nice with the filtering. These issues are not inherent to network-level blockers, but the configuration of those blockers.