This is what should solve your issue.
read my original and follow up relies more closely - I already stated both tabbed and hidden solve the core issue, but each has a minor downside to it as well. keyword minor, but also keyword exists.
tabbed works, but doesn't prevent a different kind of spam popping up in UI while - the "X new messages" popup. In low activity systems, it is less minor, in high activity systems, it is basically constant popup. So tabbed removes player chat spam, problem solved yes, but minor side effect - additional kind of popup spam.
hidden works, but also has minor side effect of hiding the non-player chat, system channel messages like - entering XXXX system chat. I noted it as minor because I can see system name in other UI locations, but in non high spam chat locations, I like seeing it here at eye level without taking eyes off flight path. Did I say it was a big loss, nope. Did I say it was a minor side effect, yep.
hence the solution I asked for - an additional simple filter allowing us to choose whether any non-direct, general player chat is received at all. This hurts you how? Oh right, forgot - there are always some players who feel somehow less when other players choose to not engage with them. PVP, their profanity laced chat spams, etc.
Have you seen some of the racist, most vile messages players are just spewing into general system chat? I was going to let this go, but given the replies here where some seem so righteously outraged that someone would merely ask for an additional filter, I'll go ahead and file it as a bug request, quoting the dev that replied, that this current chat system leads to a Fdev sanction, FD approved hostile environment that promotes and condones hostility, racism, and whatever other garbage players want to force those who want to keep system chat enabled in SOLO and chooses to play in SOLO away from that hostility.
I own shares of FDEV stock, not a lot, but all you need is (1) share to attend a shareholder meeting, presumably remote now that covid exists, but they can't outright cancel some form of annual meeting. Want to see how fast and how far FDEV's ~1850 stock price falls when a shareholder raises to the press the white privilege condoned, hostile environment and racism of oppressing a gamer minority? Just remember it's the tone and attitude of this thread that pushed me here, not my 1st choice.