Here's what I am going on about.
Exhibit 1 - I hit a wayward driving cone and get launched.
Exhibit 2 - Since I am in the middle of a long corner, this caused me to lose control and skid
Exhibit 3 - The skid cause me to hit the wall
The impact caused me to lose a huge amount of speed, obviously, but for some reason the game decides that this is worthy of a 5 second penalty. So, if I drive straight into another player and ruin their race, I get the same penalty as taking myself out of a race...ya, makes sense
Also, the slide roasted my tires, thereby ruining the race altogether for me. I had to pit early to avoid losing too many positions and I had to run 10 laps on hards, lest I fall to the back of the pack after starting on pole.
I finished the race in second, 10 seconds back. If I had just let second place catch me and then run him off track, I would likely have won and eliminated the prime contender for victory. Seems to me that being dirty is the better strategy. I'm sure others use that tactic.