I happen to be a member of some Steam group that has been having a lot of events recently, but they’re all for games I don’t play. The problem is, when the event is starting, a new Steam window pops up and flashes until I address it.
Is there any way to opt out of these invitation pop ups?
At the moment, your only option is leaving the group entirely, it seems.
There’s a suggestion thread on the Steam forums about this. It’s been going since late 2008, and as far as I can tell, it still isn’t possible.