Pickpocketing when using the thief stone levels up amazingly fast. You essentially need one perk to get it to a point that you have 60-70% chance to loot any unenchanted jewelry, and two perks into the first pickpocket perk gets you around 90%. Walk to any random NPC, stand right in front of them, doesn't matter if you're detected or not, and you can gain 2-3 levels in pickpocketing from one NPC if they have any jewelry or gems on them(and almost everyone does). This just might be the fastest skill to level in the game aside from smithing, and makes money a lot faster than smithing(if you have a fence available) since you don't need to go and enchant your daggers and get soul stones in between working the skill.

Not to mention you can use this for a lot of fun. I was hit by the quest where the thief runs up to you and hands you something, then the owner comes asking about him, gave the item to the rigthful owner, killed the thief, then turned around and pickpocketed the item off the hunter. I also walked right up to maven black briar, tok her personal key and key to her manor, as well as all her jewelry while she stood there and talked down to me.

The final advantage is that you can gain a TON of useful enchants this way. I've found almost every skill enchant and resist enchant just sitting on jewelry in NPC inventories and just lifted it right off of them.

You forgot the main advantage, getting Syglia out of those miners clothes!

Has anyone done the poisoning perk with pickpocket where you reverse pickpocket poisons onto people?

Is that any fun?

I'm playing a diabolical chef right now, pickpocketing frenzy and fear poisons is pretty fun. Allows me to run around with just a fork as a back-up weapon. Paralysis is a hard poison to give them because it has a high price. Also, weakness to poison effects stack for different poisons and build up (rather than just replacing) when using the same potion. Giving non-damaging poisons without failure is not a crime, so dropping a few weakness to poison and/or magic effects first will make sure pretty much anyone dies if you are going for the kill. Flat damage poisons from crimson nirn roots are best for killing. Then comes damage from river betties and then damage from deathbells. Skeever tails are nice also for damage health + ravage health. The lingering damage does more but is harder to pickpocket due to higher $ and higher chance of being detected before it kills.

Anyway, most fun is frenzy by far, since you can take their weapons and give them forks poisoned with frenzy first

I didn't know you could use forks as a weapon

Yup, they do 1 damage. Knives do 3 damage. They look a little too big to be silverware, but the concept is funny.

Also, if you dont want to use a fence, just pickpocket all the stuff you want to sell, find a bandit, reverse pickpocket everything to the bandit, kill the bandit, and magically nothing was stolen. (Since merchants have no problem buying stuff from murdered people, but buying stolen goods is not ok because thieving without killing is wrong!)

Wow, yeah, that's pretty hilarious.

So do you just pick up a normal fork? its as simple as that?

Yup, they are weapons in the default game, no mods or anything. I don't know where you are guaranteed to find them though, most places seem to rely on finger food or something...