Doubt you have owned the same vehicles - exactly NONE of mine ever did that …
It pretty much happens when you have a floor mat on top of a floor mat, like an Advanced Auto "Chevy Bowtie" thick rubber mat to go over your OE floor mat in your car, so the branded stylized one gets dirty and the one with the car stays "mint."
They CAN and usually do move over to catch an accelerator, same way even larger or loose shoes can sometimes do the same.. that situation is one that is on my "Oh no! Don't do that" list.. and I've always been pretty lax on what I've been prepared to let go behind the wheel. But some things, even I don't do.
As to State Farm suing Tesla.... I can see how maybe it was "bound to happen," and there may have been a time I would have blindly jumped on the anti-Tesla bandwagon. Now, looking at it with objective reasoning and as an adult, it seems more anti-EV hysteria than anything real. State Farm's deep pockets to litigate aside (I could go into my knowledge of how things go in the Credit world, but this is not that. Long story short, they will spend anything if the decision is made to do so, logic and smarts will not enter into it, moving on,) I don't see how Tesla could be on the hook, Suzuki Samurai tip-over and Audi 5000 bad acceleration doctored tests to make "evidence" come to mind.
Samsung discontinued the Note 7 over battery fire issues. It happened more than a few times I believe.
But unless Teslas are catching fire left and right, you should look maybe to user error for a guilty party... Separate conversation about how insurance companies rule the world.
If you're that worried about it, don't park your car in a garage or anywhere leaping flames could catch to other things. Maybe 100 feet away in an open field on a concrete platform with fire suppression and a license for fire alarm to the local fire station. How far will we go with this.
Virtually anything can happen at any time, you plan your life for what is most likely, life is a risk assessment equation, too many extremes here to list.