Can you add a Restrict user, to only allow 1 stream?
I’ve seen, that some people share their plex accounts with family and friends.
That would be a good feature, for us who pay to plexpass and dont want our stream servers getting raped by alot of bad people who share accounts 
No you can’t do that at the moment. Share only with people you are trust and not bad ones who share accounts 
I know i cant. Thats why i ask for the devs to look into it 
If you are using Windows as your server there is a work around, Plex Sentry, it’s a little involved to get setup (I’ve put together a quick guide somewhere in that thread)
Will set limits on number of streams allowed by all of your users, also limits sync’s etc as well.