Jon has a point, but...
"Teenagers and young adults" complicate this issue greatly.
You really don't want to invoke Darwin for this group. Most
grow up and become responsible. And I don't want caffeine
gone altogether. Warning labels are necessary to protect
both sides of the issue; ie, the group of irresponsible buyers
AND the companies who make this stuff. "WARNING, don't
stick your foot under the lawnmower, even when it's not
running", some folks need that message. Even you and I
need to be reminded that feet under lawnmowers is NEVER
a good idea. And overdoseing on caffeine is just natural
for some folks to try; and this is where it becomes a medical
issue if the warning is there. Otherwise, if there is no warning
label, it becomes a medical issue AND a lawsuit. Big hunks
of highly radioactive ore don't come with warning labels, but
most consumer items need a "read me first".
