Your IP 'll not be hidden. If you are journalist in Sochi who is using public jabber with OTR, you 'll be arrested for spreading true stories anyway 
I'll use twitter. It is HTTPS. If I'm paranoid that it knows my IP - I'll use Tor. You just dont understand what it means - secure IM.
You just don't understand that people love money and will use free alternatives for simple messaging.
The entire vision behind Nxt is to have the longest feature list among all alt-coins.
We are not talking about longterm. Right now no reason to lower fees because of messaging, because there is no use for messaging.