I just lost 100+ pods because of a Clan Banner.
As I entered a clan-owned system and had the banner displayed in my face, keyboard control over ship was lost and I died before I even had the time to click "OK".
This ruins immersion, I'd suggest to have these message popups edited to have keyboard controls available or have the message displayed in chat instead.
Or ultimately, if possible add a spawn-protection timer for 3-5 seconds so we can get rid of another rule