I just got this unsolicited message from Shivam. I am sure he sent all kinds of these spammy PMs out. And these kinda messages seem to be increasing around here. There seems to be a little "group" of these people that think this kind of behavior is acceptable.
PortProphecy, you have done what needs to be done. You provided message and name of sender so we can investigate. As you noted PM's do not have a report bad PM feature available.