Just give the two weeks notice. There is nothing to loose, and it is professional to do so.
In my case, I gave a one month notice. The boss asked me to focus on documenting my work, which I did. It was actually one of the greatest months out of all my time at that company.
When you announce your departure, write a very logical and very true letter. Don't be afraid to say something like "I think my boss lacks the skill to delegate authority" or "the office kitchen is infested with mold". So long as you are truthful and logical, it can never be held against you, and it may even serve to prove your character as unwaveringly logical.
Just tell it how it is. If they give you a cardboard box and an hour to pack up, don't sweat it, they will almost certainly be paying for your next two weeks either way.
Leaving without notice is:
2) costs your (ex) company a lot of money and time trying to figure out what to do
3) of course looks bad if anyone ever finds out from another company (but they most likely wouldn't)
4) is unethical (even if your ex company was unethical towards you, it is not justification)
5) you might get sued because they can claim you purposefully left things in a state of chaos and then cut the cord without notice, costing the company millions of dollars, downtime, etc
6) burns your bridges with the ex company. Who cares, sure, but why do it?
My guess is the reason you are considering this is that you do not have a definite day in mind to leave, but as soon as you find another job you wish to just cut it off entirely that day. Don't do this, it will also look unprofessional to your next employer if they notice that you are all-too-eager to 'move on'.