People don't need films to show them what's acceptable and what isn't does it?
Shahrukh in KANK had an affair for example, yet you love the film and don't think it's unacceptable that it shows people its allowed.
Films show sex before marriage, abortions, affairs, rape, kids running away, murders etc...does that mean that those things are allowed? Nobody rants and raves about that - kissing shouldn't be singled out in that sense.
The majority of people don't need films to show them right and wrong. People in India have been kissing in public before it was even depicted in films. It's just reality.