While I wholeheartedly agree and am fully onboard with the general principle being discussed in this thread (i.e. offloading to personal wi-fi at home if available), I just had to chime in on the above....because while I think the idea of Sprint offering incentives for people to actively follow this practice is an outstanding idea, speaking as an owner of the Photon Q, if literally every phone Sprint offers behaved the way the Q does by default (until you learn how to turn it off in the advanced wi-fi settings), I for one think you'd end up driving business away. For the first several days I had the phone, that 'feature' was annoying and irritating to the point of almost wanting run over the phone with a steamroller and bashing my head into a wall.
When someone pointedly turns wi-fi off, they generally intend for it to remain off unless they turn it back on; the Q will not simply only continually notification-'nudge' you to death to say 'hey, wi-fi is available here', it will eventually continually turn wi-fi back on if you don't respond in kind and use it. Until someone else pointed out on XDA that there was advanced settings there (I was completely new to ICS prior to getting the Q and wasn't used to the menu differential between it and Gingerbread), I was seriously considering returning the phone just based on that issue alone.