They are required because so many people NEVER do any maintenance to their cars. Thus not catching when tabs break or bolts come off. Just another case of all of us paying for the mistakes of others. Just like insurance....

FWIW I have seen this happen on three seperate occasions and always on dragsters. Where it should be easily seen if guys ever looked at their junk. Imagine tire shake is causing it to happen.

"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"