Just hit the report button please, and don't bother to comment on the thread.
Paul Myers revealed to me that if you comment right under the spammer you risk your name being too close to the spammer and a technical error can occur such as your account getting wiped out by accident. Rare occurrence, but apparently has happened in the past.
Look for the little red triangle and hit it.
If it is hit enough times, the post will go poof.