The Klitschko Bros didn't look too professional when they were laughing their heads off during the Haye/Chisora brawl, did they? Instead of preventing the fracas from happening, Wlad even stood on a chair to get a 1st class view of the fight.....
WE will see that in 10 / 20 years the K2 bros will still be living the good life, while low lifes like Glora and Gaye will be broke like so many former thugs and will lose in the end. They are jelsous low life thugs, they are the type to wait you are with a nice girl and want to start a fight when they are with their mates. They have nothing to lose and are jelous of your sucuess and just want to bring you down.
There is a number of things you can do to make it clear you wont accept such behaviour. Wlad could have pushed him away, or swept him. Or simply spat back. That would have saved face and it would not have caused him any trouble afterwards.
Bottom line: Wladimir and Vitali beat these clowns where it counts: in the ring! All the shenanigans going on outside it is for amatuers. In reality, Chisora and Haye are the helpless ones because they can't do anything to compete with the Klitschkos inside the ring. Them acting like thugs outside of fight time changes nothing.