Someone just wandering by using W10 won't spread your wifi connection info unless you give that stranger your wifi password. You only have to worry about the people using W10 that you give access to your wifi.

"Secure WiFi" only exists in the land of unicorns and leprechauns. Your Windows version is the least of your problems if you think otherwise.

Mike

what about hiding your wi-fi name? does that help any?

I think I'll go back to my tablet:

Glad my wife doesn't use facebook or microsoft contacts.

WIFI Sense is actually safer since you never share the actual password, unlike the "traditional" way of writing it down on a PostIt note or just telling them the password :-)
Most modern routers have a Guest mode anyway which separates your guests from your own network.