Don't worry about being flamed, your post was well thought through, and personally I like to see people talking about this as I'm very interested in old world content. It's one of the reasons I took up multiboxing - I still intend to get my paladin a Thunderfury for bragging rights, although I know I'll probably be trying for many months. That's if I'm successful at all. (And yes, I understand that its utility will be very negligible for m paladin compared to a good spell damage weapon, it's 100% a for show/bragging rights desire on my part)

Still, I think I'm right that if you're looking to frolic in old-world content, multiboxing is an invaluable tool. Personally, I never intend to do most of the content completely by myself. I might do AQ20 or some of ZG solo, and maybe try Onyxia for kicks. My opinion is having a team of 5 reliable characters makes starting up an old world raid easier. I already did Tiger boss in ZG with 8 people, 5 of which were my team
(Level 69 at the time)...

While starting an old world raid is difficult when you're by yourself, saying you have 5 players and you're looking for a few more makes it a lot easier. People won't think it's a waste of time, there's a lot more chance that the raid will reach critical mass. Also, you will have a large number of players who know you from seeing you around, and are damn curious about what it's like to watch you in action. It's easy to get them to tag along.