Why does HTC Incredible S turn Wi-Fi on by itself? Sometime after latest official update to Android 4.0 phone began to switch Wi-Fi on by itself when being in sleep mode (or maybe at other times).

Reproduction: turn off the Wi-Fi, leave it in a Wi-Fi enabled area (there are open networks, but no which I would like to use), and next time I look at phone it shows this notification "There are open networks" and has the Wi-Fi enabled. 

The reason I'd like to disable this behavior is phone likes to connect to some saved public Wi-Fi's when I'm on the move and browsing via 3G, thus disrupting the loading of pages. So I usually turn Wi-Fi on and off manually.
I don't have a Incredible S but the steps should be similar: 

Go to Settings-&gt;Wifi-&gt;Overflow Menu Button-&gt;Advanced-&gt;Keep Wifi on during sleep-&gt;Never.