Option to ignore notification messages like "XXX has joined the room"

[hakakou]

In the Archive, I often find many empty conversations from multi user group chats, that have absolutely no messages; just notification - information messages, like below.

This is the result of about 20 people entering and leaving a chat room all day multiple times, but without anyone actually writing a message.

Is there any way to ignore these notifications? This should also mean that most "chat conversations" (left column) should not even exist, as no real messages were actually typed.