I have no idea of what Hogg was thinking, but the book will undoubtedly be thrown at him - that sort of "tackle" has no place on the rugby pitch. He let everyone down, which I believe he has since acknowledged.
Personally I think the referee should be applauded for calling Hogg back and showing him the red card.
It spoiled what otherwise promised to be an interesting game, though I don't know that Wales can draw too many conclusions from the result. Listening to the commentary on Radio Wales you'd think they are now in line for the next World Cup, and they conveniently seemed to have forgotten their performances both the previous weekend and the game against Ireland.
Ireland were worthy winners, but like Wales they have some questions to answer before the next World Cup. BOD's departure will hit them hard, and they have other senior players who may follow him before too long.
If you had to pick a Lions team now it would have quite a different look about it.
willie_gunn