If you're trying to fish somewhere thats a little busy (Wintergrasp for example), get someone to hit you with the wand from Noblegarden that turns you into a rabbit. Although you can't cast any spells, you can still fish and add lures, but you're tiny and barely visible.
I'll add some pics later on, but you can use the white rabbit to blend into Wintergrasp's snow. Your name is still visible, but its a hell of a lot less obvious.
Also, this isn't such a great spot for botting unless you're like me and sit and stare at your computer whilst you bot, but here:
I find great. Even during battles I never see players, and if you back up to the edge of the cliff you're in Dragonblight which means you can jump back onto your flying mount/leap off the cliff and change form halfway down if you're a druid who gets his thrills like that.
Wasn't sure whether to post this under guides or exploits (As I'm fairly sure Blizz didn't intend for us to be able to fish like this), but feel free to move it if I've placed it wrong.