[JimRed]

Until the park service nazis outlawed it, we would collect chunks of ice floating in the lake for use in our coolers. It’s pretty dense and lasts a long time.

How the heck can they STOP you from putting some floating ice in your cooler? Are they that heavily staffed?

[dainbramaged]

The visitor center overlooks the lake so the rangers can see any ice collectors, most of the time. They put up a sign, too. At taxpayer's expense of course.
There are plenty of other glaciers with no ice grabbing restrictions, but Mendenhall is one of the very few you can drive to in an automobile.