curiousv:
It seems there are two very loud groups on the Internet, both extremely stupid.
One is commenting to youtube videos of even just slightly chubby people with rants like "you will die soon you idiot" and attack the fat acceptance movement for promoting a "deadly" disease. Ironically, they themselves might have unhealthy habits like smoking or doing drugs, but they are just so focused on "saving the lives" of fat people (by screaming insults at them) that they never realize their own hypocrisy.
The other is often found on this very site, claiming that being obese (even extremely so, like at or near immobility) has absolutely no health risks whatsoever, and everyone who disagrees has just fallen for the evil conspiracy of the diet industry.
...
The answer is obviously somewhere in-between. And of course it depends on lots of factors, including genetics, activity level, the types of foods consumed, and many more. Some can start having health problems by a relatively small increase in weight, others can get extremely fat and suffer only very mild negative effects. However, we should not lie to ourselves: getting to the size where mobility is severely impaired, does have significant health risks. If you plan to reach such a size, or plan to support someone else reaching such a size, you should be well prepared to honestly answer the question whether you accept those risks, instead of lying to yourself and pretending those risks don't exist at all.
This is a lot like smoking weed. People against it say it's gonna give you an IQ of 5. People for it think it makes your big brain even biglier. When in reality it's not that harmful for you but it for sure is not healthy.