All in first hand with AA - yes. I've done it and tripled up (a tourney with no real consequences unfortunately).
If in early position, you do not know how the table will react -yes, it is a risk. However, I guarantee most will think one of two things. The sensible ones will be sat thinking no one is going to be this audacious, "Uh-ho, Aces"... and fold.
The wilder ones will be thinking, this player is crazy/stupid/loose and I have Q 9 ….let's give it a go.
That said, post first hand, I would slow(ish) play any hand to really suss out the table dynamic, to see how intelligently the table was playing (or not as the case might be).