Surely, though, the Liverpool one isn't tapping up (at least based on the BBC article)? It says that they put in a bid for a few hundred thousand which was rejected by Crewe. The player has now said that he wants to leave.
I don't see how this is tapping up; it doesn't imply anywhere that Liverpool have been in touch with the player himself, merely that the player got wind of the bid and decided that he wanted to go. It's not any different to Alonso or Ronaldo saying that they wanted to join Real Madrid after heaaring about the respective bids for them.
If it is simply a case that he found out about the bid then unless the information was leaked at Crewe's end, then we've still done something wrong.
However I have no doubt that somebody from Liverpool has spoken to the lad, his family or agent already. It's part and parcel of football (and has been going on for years) and happens in 99% of transfers. Clubs won't waste their time bidding for players without already knowing the player wants to join.
Nothing can be done to stop it and unless we've been incredibly careless then Crewe will find it impossible to prove.