I'm familiar with smoking - some of my family members smoke (my dad used to as well) and quite a lot of my friends do it too.
In my case, I guess I'm 'I did, but not anymore' - I've tried smoking with friends, but it was my choice to stop doing it - it's not like there was any peer pressure involved or anything, because I don't stand for it.
It's basically all down to choice - I don't think it's disgusting, it's just something people choose to do and then it becomes a habit.
If I said I hated it, I'd be going against quite a lot of people I know, so I don't really have a problem with it!