There's alof of "Multiboxers" around, this however dosent mean they're RMT.
I myself have several characters, and i would prolly be playing atleast 2 accounts if my other PC would actually run the game.

Now why would i do this? well im out of inventory space as much as anyone else, im sick of having a half empty ls.
Even thou i love my members & i dont want to force anyone go to speed-leveling just so we can do stuff together.
I want people to take their time to enjoy the game.

I'd multibox to get stuff done when i have little time on my hand, even if it means
controlling 2 characters at once from using 2 PC's / accounts.

I lmfao at the word RMT cuz they dissapeared a few months after release of FFXIV & i havent recieved
a single /t from anyone trying to sell me crap.

Just giving a heads up on this, not everyone using multiple accounts (multiboxers) are infact RMT's.

- side note: after playing WoW for a few years...i well...learned to fear multiboxers in PvP battlegrounds,
It was both fun to have them there & extremly annoying, so i kinda understand your point.
However we do not have any PvP content yet.

Even so, me having 5 characters with 10 retainers could screw up the economy aswell, if i werent so lazy / busy with my main
im sure i could have sold alot more than im currently doing & besides i only play on 1 pc >.<