Plenty of content blockers support blocking domains based on SNI. Here's just a couple of examples from a quick google search. https://wiki.untangle.com/index.

Plenty of content blockers support blocking domains based on SNI. Here's just a couple of examples from a quick google search. https://wiki.untangle.com/index.php/Web_Filter#HTTPS_Options https://wiki.untangle.com/index.php/Web_Filter#HTTPS_Options http://www.watchguard.com/help/docs/wsm/xtm_11/en-us/content/en-us/proxies/https/https_domain_names_c.html http://www.watchguard.com/help/docs/wsm/xtm_11/en-us/content...