Buddhism is beyond cultural boundary. It is the Truth and transcends time, culture, etc. Motivation is the essence of an action, whether the result is good or bad. If the motivation was pure with respect for Buddha and Buddhism, one has right to express any sort of cultural greetings. French do often kiss out of love and affection.
I do not see anything negative from the action of kissing a Buddha statue. If that broke the house rule of the temple, then a ticking off should suffice. I do not agree that an action like that warrants such heavy punishment. I have read many times in the papers where the Buddha statues were being vandalised by those looking for treasure or out of disrespect. So what would be the penalty??
Making a mountain out of a small thing, wasting time of courts when courts have very serious jobs to do, inciting words of hatred over a kiss, thinking Buddha Idols can be insulted by ignorant actions, nothing of this sounds anything close to Buddhism taught by Lord Buddha. On a lighter note, i don't think it would have offended Buddha too, and if he did he wouldn’t be Buddha!!