I really never understood this. When I'm on and I feel like being solo, I simply just tell em. No1 gets mad/upset and then we link up later or another day. The fact that this feeling of "oh God they saw me online, what do I tell them" is abit childish or just worse than telling them you ain't feeling like linking up. I get it to a degree that you guys prefer to be invisible, but bungie already nerfed invis lol so even if they do somehow add that, they'll still somehow will see upu online