Next time we play, feel free to make all the mistakes you like! Won't hurt my feelings one bit. I promise!
If you want to go all abstract weird stuff, sure, there may be no boundaries at all (but not everyone would enjoy listening I think ;)
In most cases only because they don't understand it.
Funny how in art being "abstract" is ok, even encouraged. But abstract music- totally unnacceptable!
Abstract stopped being acceptable in art in 1992. When judges awarded $10,000 prize to painting by a 4 yo girl.