"Loud" is unfortunately hard to quantify. There's a lot of psychoacoustics that mean that the number of decidels really doesn't tell you what's loud and what's not.

This is a great demo of how sounds can appear extremely loud without actually being physically very loud: https://youtu.be/tONF9OSUOSw?t=7m16s

Anyway the point is that it's hard to make rules about this kind of thing, because sound is subjective and there are ways to circumvent any restrictions you make.

Sounds like you haven't watched a lot of free to air tv haha

Googles ad platform is utterly full of fraudulent scams and grifters. Bring on regulations and HEAVY fines for Google making profit of fraud and crimes.