You can switch the Private Message Channel off by pressing Start, Options, Chatlog, Chat Channels, Personal, Show, and finally making the square of Personal Text gray.
You'll then no longer receive any PMs from strangers.
But know that both you, and your friends can no longer send nor receive PMs either, both you and your friends will NOT receive any notifications that a Private Message was received, and it doesn't remember your settings, as the PM Channel is ON by default.
So you have to switch it off each time that you sign in Home.
You can switch annoying Group invites off also.
For that you need to go to Activity, Show, and make the square of Activity Text gray.
You'll then no longer receive annoying random group invites, but...you'll ALSO no longer receive, any invites from your friends, notifications of rewards, the arrival/departures of your friends, key instructions of games, and notifications of games.
So, that isn't very handy, but at least now you know how you can cope with unwanted random group invites.
Hope this helps you. Have fun.
You can also use the block feature which permanently eliminates the problem.
Ignore is fine but when log back onto home again you'll have to apply it again if you run into the same offender.
I feel you about the PM thing too. Yesterday at acorn I had guy keep PMing me rude stuff and I end up blocking him and put him on ignore and somehow he manage to get past that keep on it. So I tried reporting him and I froze and when I log back my friends said I was still there but wasn’t talking. So I frankly little angry at these group guys going around being rude and in future I just going leave the space because when I try doing the right thing I end up getting kick or frozen. Its so frustrating.
It already exists but if you have suggestions for improvements they have a thread for that.
Could we have a way to turn it off? That would be very helpful and have it set to something like "friends only" To keep the perverts down?
ERMIGERD, there's a perv sendin' me dirty words!! *eyeroll* Since I'm 100% certain there's no such thing as "killer" words (i.e.: words that when spoken or typed to another person, will make them dead), grow some thicker skin, click on their name and select ignore. Trust me, you'll survive this, I'll stake a certain forums troll's dull and lifeless reputation on it.