guttentag writes "The New York Times has published a large collection of law enforcement training documents obtained by the ACLU. The documents describe in detail what kind of information can be obtained from cell phones and cell phone carriers, and how to obtain it. The 189-page PDF also contains dozens of invoices from the major carriers for their services to law enforcement that describe the fees for those services."
I've never been canoeing before, but I imagine there must be just a few
simple heuristics you have to remember...
Yes, don't fall out, and don't hit rocks.