Back Packs

I used to like back packs very much coz you can throw anything into it and carry behind you back with both shoulder weight but lately I have been thinking otherwise. Why? As Singapore grows more crowded then ever and MRTs get packed like sardine and boarding bus are gets narrow, back pack has become a nuisance. People who are carrying back packs like to do this.... pull their bag and not caring if their bag scratch someone behind them or even swing and hit someone face. When MRTs are so pack, they don't even care to bring it down so it is like the back pack occupy one human standing space. In-considerate people please bring your back pack down and stop swinging it. You bag don't hurt but other people's body or face does!