Agreed. I had enough points for Burnley in LC and went to the game, I can confirm there were absolutely loads of spare seats around me.Same at Wolves in the previous round but not to such an obvious level.
All the abuses of the away tickets system need to be stopped but the problem is that it is virtually impossible to police at present.
Hopefully if away tickets go digital (like our season tickets) and points are only awarded once the ticket has been scanned that should put an end to both unauthorised sharing and buying with no intention of going. Even then I am sure that certain individuals would still find ways to abuse the system.