IF Chelsea did something wrong in their transfer then almost every other club in the world should have had the same transfer ban inposed. It was a ridiculous ban, players move around, every club is in contact with players before they make a bid for them otherwise its simply wasted time.
Some clubs do it ultra legally, by talking with a players managers, sisters, brothers, newphew, some clubs talk to the player, anyone that thinks its not normal is kidding themselves.
IF, and its a big IF, there were far stricter rules on transfer that no one abused then fine, punish them, but its not a very well kept secret this is how transfers have worked for years, and years, and years. Punishing one club, was akin to punishing Eduardo alone and no one else for a dive, ridiculous.