I decided to watch the video (link if you cbf copying out of an image) which is a bit sensationalist, overly verbose, but has a bit of a point.  So that you don't have to watch it, they're basically saying to implement something like auto-muting on players that have often been muted in the past (eg bad karma).  Probably the only other workable idea I see is the clan rating thing, but only for games where clans make sense...

IMO, auto-blocking kinda does make sense, assuming it's implemented properly.  I don't feel that online harassment is that big of an issue - just ignore them, but I guess some people find it distracting/annoying.