Annoying system notifications

In my environment it often happens that someone tries in advance of a meeting whether the connection works. This leads to many system messages (like “Foo joined the call”, “Bar left the call”,…) appearing in the chat of the session.
Is it possible to hide these system messages or delete them later? Because, sometimes you can hardly find the relevant messages within the chat.

Regards,
Friedbert

The request is tracked in Option to limit / hide system messages · Issue #1148 · nextcloud/spreed · GitHub