Two recommendations: Password protect and move to a better neighborhood
A little more complex than that. Mesh does create a problem of bleeding coverage. What's nice about the mesh coverage is also nice for hackers.
It's not so much the type of neighborhood, it's the proximity to other houses and a road. I was cracking Weps from my back porch, off a dual-core laptop, in only a few hours (back in 2013). WPA2 isn't that much more difficult with a higher powered machine, although I haven't tried lately.
A common misconception is that password complexity is most important. Not so, password length is the biggest factor. Every additional character raises the possible password combinations exponentially. Assuming a character set of 96 (upper lower number and symbol), A two character pw has 9216 combinations. A three character password has 883736. When you start getting to 12+ character passwords, it becomes very tough to crack in a given time frame.