I hate when people do that. Either while I an wading or when in the boat. There are a lot of boaters put there that are totaly clueless. This guy was at oddds with the Ontario's boating regulations you know:

The offence of ?Careless Operation of a Vessel?, has been added to the Small Vessel Regulations. An operator who is doing any of the following could be charged:

traveling in a way that could adversely affect the safety of people or property considering the weather, boat traffic, hazards or potential hazards, or the number of people around the boat
operating a vessel in a careless manner, without consideration for other people or for the factors listed immediately above.
Above is the quote from official rulebook. In other words this guy should at least offer you to make ggod on the property he damaged since it was his responsibilty to operate the boat in a safe manner.

Here in PA the minimum distance is 100 ft and authorities do not play around. Carry a cell phone with the numbers to the local law enforcement programmed into speed dial. When something like this occurs just make the call. If you can take a picture of the boat with the registration number it is even better.

You might also want to attach a boating whistle to your vest. In situation like this it coud come in handy.