Well I think that it will be a hard one. The only way to kill tubes requires a collective industry regulation where all the program owners and affiliates will work through a set of rules and guidelines.
For example:- only use short preview clips
- strict monitoring on user uploads to avoid full length clips
- each tube site owner should remove all full length clips
- when tube site owners neglecting the rules, close all their affiliate accounts at all affiliate programs
- setup a blacklisting database for tube site owners who don't follow the rules
This requires resources and a collective approach but I don't think it will work out because in this industry its everyone for itself.