Yes, but then that is a form of notification, although you could say that it's ambiguous to someone who doesn't use that feature and hit cmd+x by mistake. Or, l

Yes, but then that is a form of notification, although you could say that it's ambiguous to someone who doesn't use that feature and hit cmd+x by mistake. Or, let's say it's less clear than a alert dialog asking you to confirm. Having said that, an alert would be annoying.