RE: Simple bowling etiquette that everyone needs to know
Most lanes don't even post these rules and being told by more experienced bowlers is probably the only way that people are going to find out about them. I don't know if there is any official rules out there that mirror this but if you ever watch pro bowling you'll see that the players will get upset if someone in the audience so much as accidentally coughs.
I remind our participants every week that we go about the rules and a lot of them are inexperienced or are Vietnamese and never knew these things. Hopefully they will pass it on to other people that they bowl with in the future.