Due to a statement by the Land Transport Authority of Singapore, Singapore bus passengers could be fined hundreds of dollars for doing that. And people who annoying to others such as placing their feet on seats, playing audio at loud volumes, littering, eating or drinking on the bus could be fined up to 500 SGD ($390).
Singapore, known for its strict laws to enforce public cleanliness, is not alone in its efforts to create a more peaceful commute.
Whether these rules get strictly enforced or not, always remember the number 1 rule when taking public transport and just be kind.