It’d be useful to be able to create a staff note that’s highlighted as an alert, to make it stand out from the notes which are just added to a user profile for general reference.
Staff notes have been really useful for me to use to record the fact that I’ve done some checks on a new user to make sure that they weren’t banned previously. Some users are more suspect than others though so I’d like to be able to flag the fact that I should pay closer attention to particular users, whereas I’ll add other notes that I’ve given a user the ‘all clear’. This might also be useful if a user’s been given a formal warning before etc.
I’m imagining a different e.g. 
/ extra icon being displayed next to user’s usernames where the 
icon for staff notes is now, to make these notes very visible but I’m sure that other alternatives would work too.