Finally you asked a realistic question (although before that was more giberish). to answer your question:

It depends on the circumstances. It could range anything from a short discussion (for example if you can provide your address, ID number etc. and the police feel that you are a border resident), to accompanying you home in their police car to get your ID, to a fine, to an arrest. It all depends on the precise circumstances, the countries involved, the attitude that day of the officer(s) and the individual being asked for their ID.