The Solo disease?

[Chezen]

And also solo'ers can effect the community of mmo negatively as they are one less person who are willing to join groups. The more soloers less amount of groups can happem. This effects group based mmo Like ffxiv. And it a reason ffxi had grouping issues and why they made the game "easier".
A party to level or do content should not take 6 hours to form because the only people free are the soloist who are not interested.

I was told something in ffxi " mmorpg are community games, how you play CAN effect others" I'm all for options unless it effects people negatively.

Well Kilta... every soloer will now be beating down your door to play with you...

Edit: And to clarify, I'm not saying that to be mean, I'm saying that because there are better ways to approach your point without angering and alienating people.