If you're like me and barely functional because of your absolute lack of focus, logging in and forgetting you're logged in when you get distracted by a youtube video or pornography is a frequent cause of character death and harm. You can fix this by setting up a trigger to fire, when MUSHclient is inactive (that is, you're tabbed out of it) to make a very small noise notifying you of the change.
My noise is the COD hit marker.
(https://i.imgur.com/Fxd9tDV.png?1)
The backslash escapes the period, because I made it a regular expression, as the period is an expression marker when you do regular expressions.
You can also go to World Properties -> Output and check "New Activity Flashes Taskbar" to get a visual cue.