I'd rather receive a second serve, play the point and lose that point, than win a point through my opponent double faulting. Normal points, not set-points obviously.
Just like I'd rather lose a good match, than win one on foot-faults and double faults. Same for volleyball- my serve placement is great, but I don't really want to win more than two points in a row by placing the serve well and having that entire team standing still watching it. I want to play, not just to win one-rally points.
When I play tennis I'm less of an ******* than in real life (not much of a challenge).
Preparing to serve only takes a few moments, and restarting after an errant toss means that it would have been a lame serve anyway. Excellent- now a good serve is coming up. I'd rather defend against a good serve, than smash a weak one.
So putting pressure on your opponent while they're serving just isn't my style. Some players will do things of varying subtlety to put you off. What this guy did was hijack three other people repeatedly to make a childish point. He did it in an particularly aggressive and arrogant way. I wouldn't even partner someone like that. I like to think I'd walk off if it was a singles match. He's obviously got a pressing engagement he'd rather be at.
Have I played worse players? Have I won 6-0? Yes. Did I enjoy it? Not particularly. I like to think I did everything to make sure that the other players had every chance to play their best tennis.
Gamesmanship isn't my style. Where do you draw the line? Ball tampering? Mentioning the war? Arranging for his car alarm to go off in the middle of a match?