Teachers will run into the problem of a students not having their work done all the time. The way the teacher deals with the situation is what matters. In the case that they have to have it done because they will be live on the internet the next day is no different than having a deadline due for grades. I have had both kinds of teachers the ones that don't care what kind of excuse you may have and the ones that are understanding and will allow you to extend your deadlines. No matter what the case is, I think it is important for students to learn about deadlines because they will have to deal with them all their lives. And if they get used to their teacher telling them it is ok if you are a little bit late then they might not learn the concept of deadlines.