Another thing is that cold water can also cause fever(not sure lah) as our body over regulates the temp. in our body(means increase body temp. to high just to warm up the water).

I heard opinion said that in order to burn calories it is better to drink warm water as that would increase body's metabolism thus releasing more energy.

Isn't fever can also because by tempreture? Besides cold water also cause tonsilities if i'm not mistaken .

don't believe it in being bad
no scientific proof
complete bullcrap

i drink cold water like an elephant.

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O RLY?

This cold water diet method is just theoretical only. its just using basic physics. Simply put if you drink ice cold water, unless you pee ice cold water also, your body must be heating it up. To do that it has to raise body temp and thats by burning calories. How many calories is debatable. Additionally, if you presumably live in hot weather country ambient temp in environment will mean you dont have the same effect of someone in cold country drinking ice water as their bodies have to counter environmental and physiological temperature (technically they burn more calories than in hot weather)

But in any case, drinking ice water brings no harm, only joy if you like it.

Only harm may be to your teeth enamel which can be shocked by ice water or anything you put in your mouth that is so cold.

LOL! Dude, common sense aint so common you know. 
BTW, have ya tried to do that hand in  water thing on your sleeping buddies b4? Makes them lose control and pee in their sleep apparently. Wonder if it works on women same as men...?

Good question and I think revealing of human psyche. Generally i think people  wanna have one single thing to blame for whatever their condition is, weightgain lah, some old age pantanglah, weight loss lah, mati pucuk lah...senang what, if can just blame cold water and cut it out of your life. As if so easy lah... Like we humans are some single cell organism or something that don;t live in complex systems...