Getting the From and Message field filled when sending money

[AyKarsi]

When sending somebody bitcoins using using the rpc-api, I want to add my name and a message.
Currently I'm using sendtoaddress command bitcoinaddress amount [comment] [comment-to].
On the client sending I can at least see the message.
On the recieving end, "From" is unkown and the message does not appear at all.

I've noticed that the GUI greys out the message fields when sending to a bitcoin address.
I fear this is by design..

[AyKarsi]

and is there a reason for this?