Child Smokers

ecToday I found it quite odd seeing what looked like a 12 year old child smoking an e-cigarette. First thoughts were how long have you been smoking before you made the switch to e-cigarettes or is there a new trend where people now start their life as smokers with e-cigarettes.
I then started to think as an adult it’s your choice to smoke and you shouldn’t be condemned for it. But as the saying goes children are like sponges and will copy most of what they see. So if you smoke around your children are you setting them up to be smokers? If so is this fair?