The man who claims he was flipped off is none other than the desipicable Ted Sampley.
Here is Republican John McCain's Feb 13, 2004, statement on Mr. Ted Sampley.
Statement of Senator John McCain:
"I strongly caution reporters who may be contacted by or are interested in Mr. Ted Sampley and the various organizations he claims to represent, and his opinions on the subject of Senator Kerry, or any subject for that matter, to investigate thoroughly Mr. Sampley's background and history of spreading outrageous slander and other disreputable behavior before inadvertently lending him or his allegations any credibility.
I am well familiar with Mr. Sampley, and I know him to be one of the most despicable people I have ever had the misfortune to encounter. I consider him a fraud who preys on the hopes of family members of missing servicemen for his own profit. He is dishonorable, an enemy of the truth, and despite his claims, he does not speak for or represent the views of all but a few veterans. The many veterans I know would think it a disgrace to be considered a comrade or supporter of Ted Sampley."
...So there you go, a statement from one of the most respected men in the USA. I think I'll take his side over Sampley the profiteer and Limbaugh the drug addict.