How do YOU spend your RAF level grants?

[tldr]

Are you referring to 'boosting' or 'tagging'? If you're boosting a team through instances, then you should be getting multiple levels per hour regardless of how high of a level your booster is. If you have an efficient route for boosting through instances, then you can have a new character at level 80 in about 12-14 hours /played.

I probably don't understand the difference. If there's a significant level difference between the leader and follower(s), the lower level toons aren't going to get much, if any, XP. You can still complete quests for full XP, but that only happens once (for most quests, at least). I tried doing this with an 85 hunter and the 43-ish mage, and it seemed like it was more trouble than it was worth. Of course I was also trying to do RFK which is a complete PITA to get to now.

Surely you weren't uncertain that handing out free levels to a low level character in a high traffic area would cause a stir?

Had I really given it any thought before-hand, I would have guessed it would cause a stir, yeah. :-)

[MiRai]

I tried doing this with an 85 hunter and the 43-ish mage, and it seemed like it was more trouble than it was worth. Of course I was also trying to do RFK which is a complete PITA to get to now.

To receive the RaF benefits the linked characters need to be within 4 levels of each other. Your initial post in this thread states you have 5 accounts, but from your last post it sounds like you're only trying this with 2 accounts. You cannot boost one single character with a high level (and still receive 300% XP) because you're obviously going to exceed the 4 level RaF limitation.

I probably don't understand the difference.

Many would refer to "boosting" as running a team of characters through an instance on which their levels are on par with, while a high level character clears it very quickly for them. "Tagging" is a method of leveling in the outside world where your team tags a mob, and others outside of your party, kill it.