We've asked people to leave the library because of screaming children before. One woman was sitting on a PC on Facebook while her child was going ballistic. 10 minutes is a long time and really I think parents need to give a little in those situations. Yes people need to be a bit tolerant but parents also need to be aware that their children's behaviour is affecting other people. It really depends on what went down, but 10 minutes is plenty of time to grab what you need and get the eff out, or abandon the mission all together.