I have given this problem a lot of serious thought!
And after a lot of careful research this is what I've found:
There are some folks leaving un empty beer containers along the trail and squirrels are finding them.
Some of them become emboldened after drinking this beer and think they have become "John Wayne" or something.
Some others get to thinking they are "Rambo"! And even try to attack trail riders!
Still others think they have become Superman or something.
And the truth is we all know that squirrels CANNOT handle alcohol. And shouldn't drink!
This bad behavior can only lead to tragedy! And none of us want to see this.
So, if you have a beer along the trails, (and there is nothing wrong with this) make sure you drink it all and bring your containers out with you. The squirrels and I thank you.