While tricks like these can very much work (and a lot of people make it work specially using Nepal as entry/exit point), they are dangerous. International travel can be stressful sometimes with issues like delayed flights, lost baggage and this will just add to it. All it would take it is one mistake and the person using these tricks will get into trouble for knowingly lying and breaking the law to game the system. When caught, this will damage ones record with immigration authorities and this may even mean a temporary entry ban for some time.