Hey Russel!
I'm probably not the best one to stick up for moderation as my preferred activity is to go on runs that can be upwards of 30-35 miles solo on mountain trails (obviously a summer time activitiy in my neck of the woods) but you're right. Almost anything can be over done.
Sometimes it's done in the best interests of people - you're example with the responsible fraternity. Some times not. See all the legal disclaimers on ladders and hair dryers.
I read the labels and warnings when I buy things and it just amazes me that people would think of - it would be like smoking the detergent, claiming harm and blaming someone else.
I loved your disclaimer:
In addition, do not eat the detergent, poke it in your eye, or stick it up your nose. Any substance can be harmful if handled inappropriately.
I remember my freshman year at Texas A&M University. Most fraternities had drinking parties involving excessive amounts of alcohol, so one of the more responsible fraternities had a drinking party with water. Whomever could drink the most water won. Two young college students died that day. It's like my wise old grandmother told me, "Anything done to excess is bad for you."