Why do Jehovah's Witnesses refuse to use the words for baptism given by Jesus Himself?

Jesus instructed all His followers to baptise: "in the name of the Father, and of the Son, and of the Holy Spirit". However, JWs (who claim to strictly follow the Bible) refuse to use those words. This means, of course, that their baptisms are completely invalid and the only meaning they have is to make the recipient a member of the JW organisation. Do new members of the JW cult actually realise this? Are they told by JWs that the baptism they are going to receive is not biblical, does not use the words Jesus gave, and is therefore invalid as a proper baptism? If they are not told this, and they are led to believe they will be properly baptised, surely this is a case of abominable deceit?