people who abuse meth tend to crave sugarly drinks...and theory is that
meth changes the pH / Immune systerm in the mouth... you can tell when
someone has been doing alot of meth by those black decay on the facials
of anterior teeth.

Flap,
I hate to bing up this issue,
but methamphetamine has far more consequences than those stated in your
blog.    You would not know this, but, being a stimulant,  it has the
potential to transmit harm to a friend or family member of the meth user.
The classical outcome could be crohns or Ulcerative Colitis.    Crohns and
UC are usually in the background or nowhere in the discussions of meth, but
because it has taken on an importance here, I will reiterate what it can do
to an unsuspecting
second or third. party  who need not be on meth.   Stimulants have the
potential to transmit harm to others.    What it does to the user is
unfortunate, but that is a choice the person makes, but cannot realize that
the consequences extend to innocent people with whom the user has a mind
connection.    That transmitted harm continues whether the two or more
persons are in the same room or miles and miles apart.   (even Sri Lanka, as
an example, as has been humorously suggested)   But the harm is real.     On
the crohns group, at one time a child of 8 whose mother was on meth was
suffering terribly.   Her grandparents were taking care of her.   and would
not believe this theory, but finally questioned it more thoroughly and I
believe accepted it, as no more was heard about the child, Amanda.
There could be a book about the extended harm meths and all stimulants do to
others, but as has been noted here, it is not a scientific theory, (nor is
it a logical one, may I add)   but that does not exclude it from being fact.
When a football player (age 23) died of  unknown causes on the news today,
stimulants can be suspected.   Some friend thinking of the football player.
So the damage done to the meth user is minor in my opinion as what it can do
to an unsuspecting person or at least equal.
This unknown problem needs to be researched.   Of course the very nature of
the theory makes it difficult to research because people are involved, and
it requires truthfulness and forthcoming testimonies of the users of meth
and that  likelihood  for truth  is 0.1%. And that is a generous figure.
Of course. crohns can be caused by any stimulant, legal or not.
And the list of drugs is long, meth, marijuana, cocaine, xanax, buspar,
depakote, natural herbs, kava kava, st johns wort, anti-depressants, etc.
etc. etc.
A separate problem with meth can bring it to the forefront of what all
stimulants can do.
More than you expected, but it should be known that meth  use  and other
stimulants carry a manmade harm to others by mind/body connection.
Gail Michael