Technology walks a fine line between liberation and suffocation.  Take this advertisement for example.  When a commuter sits on the bench their weight is prominently displayed for all to see.  Although this might get some folks into the gym, what kind of impact will it have on our eco system?  And by eco system, I mean how many people will opt for driving their car versus taking mass public transport when it invades their privacy in this manner?

[Treehugger]