Oh, so you like to remove choice from the marketplace, interesting. Have fun in your Volkswagen.

1) Add-ons must be free of charge.
All add-ons must be distributed free of charge. Developers may not create "premium" versions of add-ons with additional for-pay features, charge money to download an add-on, charge for services related to the add-on, or otherwise require some form of monetary compensation to download or access an add-on.

You fail.

[Citation Needed]

The only remote possibility would be a user downloading an *.exe from a non-mainstream site, then running it without out first checking it out.

I know of no mainstream addon site that allows *.exe

Just admit it, your powerleveler stole your account.

You're not actually communicating with their servers, addons can't get out of the sandbox. Think about it like running a widget on your desktop.

Fail. Addons can't steal passwords.

Christ, I thought you were just big headed since I've never heard of your addon.

http://www.wowinterface.com/downloads/info9896-QuestHelper.html 3,215,622 Downloads
http://wow.curse.com/downloads/wow-addons/details/quest-helper.aspx 20,949,412 Downloads
http://wowui.incgamers.com/?p=mod&m=6145 49,914 Downloads

(balance this with Auctioneer, which has a paltry 12 million downloads..)

Exactly, Blizzard derives increased value from users taking the time to level a second character due to QuestHelper. Many users use Auctioneer. While those are free with exceptional support there are also many that are not free such as Zygors' Guides ($50), Carbonite ($2.50/mo), Brian Kopp's Guide/Addon ($59.99), Joanas' Levelling Guide ($77), and QuestUp ($47).

You'll note that the paid addons are for quest assistance.

You'll note that Brian Kopp (previously featured on slashdot) is now making cash by selling an ingame version of his guide, me thinks this is retribution.

Also, as an addon author myself I can only say "Go ahead, turn off all your API's, see how that works out. I can farm other games".

http://www.house.state.tx.us/members/dist6/berman.php