Your first link is fair enough, and the article is worth discussing; but a you need to put a little more care into your research if you want people to take your arguments seriously (see the comment directly above!).
The Health Status link is broken, the third link sends me to some random “fact calculator” which is also happy to tell me “Usual weight for someone who is 18 metres tall is between 5994.0kg and 8100.0kg.” The final BBC link directs to a BMI calculator which correspondently makes a lot of questionable assumptions. As discussed on BoingBoing previously, BMI is a pretty flawed method of determining healthy weight.
