Ouch, that's nasty. It also has security implications. For example, suppose you have a multi-user computer, where one user is has a video call going, which transfers packets over UDP. Another user could check what port they're using, bind to the same port, and steal half the packets, letting them effectively listen in on the first user's phone call.

Well, hopefully most conferencing tools use end-to-end encryption. But the point is that we don't normally let unprivileged users steal network traffic intended for other users.