1. You can make a twink in less than a week. Especially a 19 twink. Most of us have friends online, after all this is a social game. All the twink gear is EASY to get. It comes from quests, drops in dungeons, comes from pvp rewards, and sometimes comes from AH. The enchants are easy to get too. If the non twinks that always QQ would just TRY to make a twink, they would be SURPRISED at how easy the shit is to do.
2. Twinks are as easy to kill as anyone. It might take 2-3 non twinks a little bit to focus fire one down, but since the bug fix twinks are easier to kill than ever. - 1k hp across the board easy. Also, twinks are a BALANCE of stam/dps stats. If you twink to have high HP you lose a lot of dps stats. If you twink to have high dps stats, you lose a lot of HP. It is simple math.
3. Twinks are fun because at the lower brackets all classes are more balanced. They don't have 25 keybinds just for one spec and auto win buttons like level 80s do. People twink because that is what the game was designed to allow the to do, IE have the potential to get the best gear available for your level and enchant it. No one is exploiting the game to make a twink. No one is playing outside the game design to make a twink. And no one is doing anything that is impossible for other people to do.
Here: look at this armory, everything on this toon is EASY to get, except the arena grandmaster, and it isn't even that hard.
http://www.wowarmory.com/character-s...n=Willyshatner
On my secondary account, no expansions added. No BoAs, nothing. I even made him at a time when my primary account was inactive. Didn't have any money, I farmed everything and leveled all by myself.