You people seem to have some incite into this topic...
Just curious how you all deal with insane people. Functional to a point but obviously insane. We can call them the functionally-insane if you like. Typical example is that guy (made up or not) from the 'shat all over the place' story although that guy finally became un-functional.
Just a few casual observations from a layman:
1. You cannot ignore them. Ignoring them makes them think you are stalking them. (I told you 'insane').
2. You cannot reason with them. Trying to reason with them makes them think you are obsessed with them and hence they think you are stalking them.
3. You cannot have a conversation with a friend within earshot because they will think you are talking about them and are obsessed with them and hence are stalking them.
4. You cannot complain to the authorities since they won't believe you. Who would believe insane ****? You must be obsessed with them. Are you stalking them?
5. You cannot kill them because then you would HAVE to stalk them, and then they would not be insane.
Feel free to ride this anyway you want.