I sort of agree with the first post. While I definitely wouldn't say that LFS is boring at all (had a ton of great races last night, in fact) it wouldn't hurt to be able to mix things up a bit more.
The best thing about LFS is it's realism, but that doesn't mean it has to be ONLY about racing around tracks. Not long ago there was a very long thread about soccer (football) in LFS, ala Top Gear. A lot of people, myself included, really liked this idea and Scawen even talked about what it would take to add a ball object to the game just for this purpose. Similarly, there was a recent thread about the "stunt track" in a very old pre-alpha build of LFS. I would LOVE to see something like this added to the game. Can you imagine the old game Stunts but with the excellent physics of LFS? There have been a ton of requests for uphill/downhill/togue tracks. This would be great for one-on-one racing or time trials, but would break up the monotony of racing in circles. Also, we already have a very large group of people who use LFS purely for drifting. Again, the realism and great physics is what makes this possible.
While LFS is a racing sim, I see no harm in adding a few "fun" elements to the game. At worst the racers who don't want to use them won't. At best, it could add some fun new modes to the game and increase the player base. Draw people in with the fun and variety of the game, then keep them coming back for the great racing.