On my recent flight from Riga to Amsterdam, I had a 125ml toothpaste tube in my carry-on. That's 25ml over the limit, but the security person let it pass and just told me that it's technically disallowed. On my flight back however, I was forced to throw it out.
So I wonder, what if I just didn't take it out of my carry-on luggage and pretended I don't have any liquids? Could their X-Ray machine detect it? Are there any repercussions for not taking out the liquids?