I'm with Beefy here too, VvD is being a dick if he's refusing to train
Its silly to expect a foreign player to have the same loyalty to a club as a fan would, so expecting them to stay ahead of much better offers for them is silly - but equally if a player is being paid by a club they should at least perform their minimum duties while they are playing for them, even if they do want to transfer.
I'd also include a player implying they will sign a contract extension but actually running it down to be a scummy thing too - if a player wants to leave for somewhere better in the long run then they should sign a contract with a release clause.
It's why I have no bad feeling towards Alonso or Suarez (and Coutinho too, if that does happen), but do to Sterling and Torres. They both completely stopped trying in their last 6 months at the club, and as a paying fan the bare minimum I expect from a player is for them to at least bloody try.