There are many 'everyday' activities, foods, and substances that can be shown to be harmful to the individual in the long term, and thus have a negative effect

There are many 'everyday' activities, foods, and substances that can be shown to be harmful to the individual in the long term, and thus have a negative effect on their close circle, the healthcare system, and potentially society, but which are socially acceptable and so remain. e.g. Alcohol is worse than no alcohol, for many reasons. Smoking cigarettes, obvs. Eating meat is worse that not eating meat. Doing woodwork without breathing protection may damage your lungs. Cleaning with spray cleaning products regularly may damage your lungs. Sun exposure increases your skin cancer risk. Running is more likely to cause arthritis than cycling or swimming. Loud environments may damage your hearing. Insufficiently frequent ejaculation may increase your risk of prostate cancer. Yes, I'm being deliberately absurd to make the point, but still: where, and how, to draw the line?