There is always some risk while coming back if you have some kind of violation, but it depends upon your luck as well. Mero arko sathi jhan alcohol case ma parera jail nai ga ko manche, Nepal bata aaunda kehi sodhena rae!! Kohi kohi ta 2 patak samma nepal gayera aako pani chan. Tara if you have to go to Nepal then while facing the immigration officer be sure to answer with confident whatever he asks. If he sees you  are frightened of something then he might stat pulling all your records. Then u'll be in trouble. Remenber, an immigration officer doesnt have a lot of time to go through every details. His primary objective is to look at the validation of the documents and status. Dont do any thing to raise a red flag. These things doesn't happens to everyone. Its just a luck. But still ask yourself a question " what is important?"staying here or going to Nepal?  Whatever you do, it might change your life for good. So think 1000 times before you act.

Good Luck.