Prevent video calls and screenshare from non-friends

Discord has a safe dm options. It filters images, but not long ago a disgusting situation  happened with me - I was looking for party in game and random guy wrote me, he started a video call and it contained NSFW content.

So after I blocked him, I dug into settings. There is no function to block incoming video calls and it makes that type of call unprotected - it starts to stream instantly and you have no choice, but watch. Probably screenshare may be in danger, but you have to join stream to watch it, and it's kinda option. 

Coming up with conclusions - function to prevent video calls and screenshare from non-friends is good improve to discord safety and it should be added.