Yes, it is funny and troll-ish to do to someone else. It's just no fun when it happens to you. I do realize that's kind of a cheap way to win a race. It's kind of like ringing out an opponent in a fighting game, instead of beating them with skill. To destroy your opponents' cars, instead of driving and drifting through the track as normal, while encouraged in some games, is frowned upon in others.
Pretty much the point of this particular thread is to either display funny memes that pertain to racing games or discuss relatable things, be it joking or serious, that only those who play racing games would understand. I'm not sure if that was a clear enough explanation, but that's the best way I can summarize it. Funny thing is, the discussion about trailers vs. actual gameplay could apply to video games in general, but I see the problem a lot with racing games in particular.