I hear these arguments and while I support safe operations and avoiding putting others at risk, I also read constantly of laws that either don't exist or I've never seen. The WA Boating publication is mentioned so I'll quote it exactly:
The wake created by a boat may endanger inexperienced boaters, persons swimming, or wading anglers. For example, a boat's wake may rock, swamp, or capsize other boats. Passengers also may be thrown off balance or overboard, leading to serious injury.
No matter how large or small your wake, you may be held responsible for any damage or personal injury it causes. To avoid the expense of repairing another person's boat or paying their medical bills, limit your wake by slowing down.
It doesn't indicate any criminal aspect, just civil. Also, it uses the word "may" as in a court determining who was responsible or how that responsibility should be allocated.
In most circumstances the key word is "reasonable" and the opinion as to what is reasonable varies widely. I've observed many incidents my entire boating life in which two parties had very divergent opinions on the subject. If your wake leads to damage, you are not automatically guilty of anything. The reasonableness of where you were, how you were operating and the nature of the damaged property and it's location. I live just off the ICW and I am not only not in a no-wake zone, I am very close to a water skiing and personal watercraft area. If my dock gets damaged by their wake, then that's strictly my problem. Same if my boat docked at my dock. I have to be reasonable as well and the expectation is there will be wakes. If you're in a no wake zone, then that's far different. We even have two different levels of zones. Yellow is slow speed, minimum wake. Orange is Idle speed, no wake.
I don't know the circumstances leading to this thread so have no opinion as to the activity. I've been near Ferry routes and learned long ago to anticipate large wakes from most of them. On the other hand, I've been in clearly marked no wake zones and a wakeboard boat go by and rock me unbelievably. Actually one of the worst situations is those who see the no wake zone so pull back at the last minute and their wash from doing so is huge.
The reality is that we all have responsibility in trying to avoid damage or risk to lives. Those of us cruising and those of us anchored or docked. The determining factor when no specific law is in place is the determination of what is "reasonable." However, most truly responsible boaters go a step beyond what might be reasonably required out of respect for others and a desire to avoid problems.