Not that I need to steal someone else's Wi-fi, but my phone says that all the Wi-fi connections around me are locked down. A subsequent survey of my neighbors confirms that even their hidden connections are locked down. At my second home, there's one guest open but it offers zero throughput.
I used the term "steal" because Wi-fi isn't an unlimited resource with negligible cost, I consider using someone else's bandwidth without permission as theft. Further that someone may have conned the provider into believing that their use wasn't going to have any impact is reprehensible.