Well it's a toss up it seems.
I am a former chain smoker, I quit 15 years ago and am d**n glad I did. I know inhaling the smoke, 2nd or 1st hand is BAD and I would rather NOT breathe it in at all, ever. When I go over there my clothes stink and I have to leave them in the garage then go straight to the shower because it's all over me, in my hair, etc.. Ugh! Then I have to wash my clothes twice in a row to get it out of them.
I've cleaned a lot of houses and things over the years that were nicotine coated and that stuff is bad news and it gets inside of everything..
I bought the little Canon remote control so I'm thinking that I could set the camera on a tripod, put a large, clear baggie around it and rubber band it around the lens neck then push the remote to snap pictures when I want. Setting up for video will be a different story though..
I have another remote coming in that is a digital timer, I hope it comes in in time so I can do time lapse photos, like once a minute. I could compile them into a cool video.
But yeah, I don't fancy inhaling cigarette smoke, not for one minute or one week. I just want to minimize the invasion of it into my camera because if it gets inside the camera getting it out would be completely impossible.
As for tattoo safety, it's a thing that is very strictly monitored and controlled by the state. It's safe these days, unlike the old days when there were no safety controls in place. I've had ink for many, many years. I'm a rebel.. 



