One thing is inadvertently going beyond cert, the other is intentionally doing so. Some countries it is forbidden by law, others it is just the training agencies standards. In some countries it can be a nightmare if something happens and needs to be solved in court or with insurance companies...
Now, I am neither a lawyer nor have I read all agencies' standards, but I am pretty confident none will tell you it is ok or encourage you to do so.
Sure, you dive beyond cert nothing may happen to you: no lightning strike as punishment from Poseidon or anything of the such.
On the other hand, what is the rush? Do your AOW, dive a few dozen dives and if you like diving- then expand your horizons, maybe master diver or beyond.
No dive is worth risking your life (or your buddy's, by the way), and the main problem with your question is that as a novice diver you may think that you already know everything you need to know but most likely it isn't so.
Dive according to your cert, get experienced, learn, live to dive many years.