Eh.. "sharing" is relative. Essentially the N900 acts as a mobile proxy server. You're just logging into the box with an ssh client (ssh = secure shell, meaning it's encrypted traffic) like PuTTy, setting up a tunnel and then surfing wherever you need to essentially from the location of the phone. So say you want something in the U.S, you would just have a U.S. N900 user create you a temporary account and off you go. Or in France, same thing, etc. If everyone got on the bandwagon, it would be close to impossible to censor anyone.
Unfortunately no, most are not bothered because most don't see anything wrong with censorship. sacrifice for the state and for the collective's perceived welfare comes first here. a lot of my friends here eat up what the state-run media tells them. but i should mention that the younger generation is a lot more flexible and accepting if you tell them something is wrong with the way things are done, or if you discuss Chinese history/politics with them.