But you seem willing to condemn them solely on the basis of their having spent that money on a foolish pursuit having overflown destitute and starving people in the process who could have put that money to better use. That's a value judgement on your part and when people render judgement about how others live and spend their money it indicates at least a willingness to insist that they spend it on something more "worthwhile".
Your expression of disgust at their choices is more in line with those who wish to use government and taxation to enforce on others their idea of what's right. If you don't believe that's what you imply with your sentiments then you need to more closely examine your own beliefs.
You have a very vivid imagination. Disapproving of certain activities does not carry the faintest implication of endorsing government interference with those activities. There are much better ways -- more effective, and with fewer evil side effects -- to urge people towards what one regarrds as socially responsible behavior, than to pass laws and dispatch government agents to enforce them.
I also disapprove of people stuffing themselves with junk food all day, but I have no interest in seeing the government interfere with them. However, I will not hesitate to pipe up when I hear other people whining about what a "disgrace" it is that these self-stuffers aren't getting all the medical care they "need" for their self-inflicted ailments.