how do we treat the temple?

Know ye not that ye are the temple of God and that the spirit of God dwelleth in you? If any man defile the temple of God, him shall God destroy: For the temple of God is holy, which temple ye are. - 1Cor. 3:16-18.

I know most people think that it is only talking about things we watch or listen too, but how about food? I have heard a lot that everything is ok in moderation.
Are we defiling the temple of God when we eat junk? How much can we apply moderation when speaking about defiling the temple?
We see a lot of sickness these days from heart burn and obesity to heart deseases and cancer. Is this not God destroying our temples just like he said he would?




How much is our service to God affected by it?

From this point of view it is especially upsetting to see churches serving junk to their flock, especially children. We offer them brightly colored candy as a reward for memorizing the Scripture. We feed infants formula just so we don't breastfeed in the service. Church's potlucks? Ugh, I feel like fasting just thinking about it!