Previously I installed Gizmo's EXCELLENT Stop Spam application
Awe schucks...
It added the exclamation marks and did everything it was suppose to.
I believe the only indication on the view member screen in the CP is via a link on the main page of viewing the user, look for a button named "more info" on the "spam check line".
And, of course, what prompted this is we got spammed FOUR times yesterday from Denmark. I had to manually Ban them.
What spam level do you have set? I think #3 is the best at achieving what my mod did for registrations.