As far as I know US consulate has access to your academic performance and your current enrollment. I think as long as you don't have to visit US consulate in Nepal you are pretty much safe. It is certainly a matter of concern and luck too if they ask lot of question regarding your performance rather than your status in US. Getting tickets at Gas station doesn't relate you as most of the tickets are issued under name of the gas station indicating the seller, so you don't have to bother about it, no will ever know. Now it's up to you to decide!