User Control

Would be good to have a friend’s registered devices which you can control. Reason being, if they give their credentials to someone else you should be able to lock that device out.

Do you really want to start micro-managing other people’s media devices?

IMHO there is only one way to deal with this:
Stop sharing with the user responsible. Only that will drive the message home to not share one’s Plex credentials with anyone.

Yes, it would be good to allow a friend one or two devices.
I agree that they will be removed, just good to have that little bit of control.

Wouldn’t it be easier to block the IP address of the person they’re sharing their credentials with? Or even beter, only allow the IP address of your friend?

@Rolf_ said:
Wouldn’t it be easier to block the IP address of the person they’re sharing their credentials with? Or even beter, only allow the IP address of your friend?

In this day and age, IP adresses are no longer fixed to a person. IPv4 adresses are very scarce and get regularly reassigned to different users. Not to mention mobile networks, where the IP address assigned to a user can change rapidly if said user is on the move.

Therefore, banning and whitelisting based on IP adresses is no longer effective and can cause trouble for legitimate users when they get an IP address assigned by their ISP which formerly was used by a blacklisted user.

Another option would be to allow a user with whom one shares his/her plex media server to allow no more than 1 or 2 streams. So, a limitation on streams would scare a user to share his credentials because it cannot be used more than the limit of the amount of streams allowed because he won’t be able to use it him/herself when the limit is reached.

This has already been requested.

Early 2021 clean-up: implemented (indirectly: limit # of parallel streams per user)