I found this out the hard way. I too would random whisper people for dungeons. Now I guess I can be considered spam, but this worked well in getting people.
Now every time I log or die I am "silenced" for a minute or so? I understand the premise, but and honestly can say I have not got random whispers as much from gold spam.
I just want to know if this goes away since it has been almost a week since I have been on "timeout".