I once was half way through a road trip when google maps routed me off the highway, through a walmart parking lot, and onto another highway.

I assumed it was a badly performing algorithm. But if it had instead routed me through a McDonalds drive through, I'd have assumed it was foul play.

I think the article makes a decent case that this was the former and not the latter, though it would be interesting to see route leaks visualized on a map over time. Too many odd coincidences could sway me the other way.

The only reason BGP route leaks aren't more common is the filtering of other ISPs. It's pretty easy to make a mistake you don't intend to.