I should imagine every player that has moved to another club whilst under contract has been tapped up.
People talk in football and a conversation between players leads to words with managers and an approach and if thats tapping up then every club is guilty as charged.
No team wants to lose good players but the fact is football has a pecking order at every level of the game and frankly the higher up you are in the food chain the less likely it is you will lose an important player.