Massachusetts laws regarding smoking are summarized here:
http://www.mass.gov/courts/case-legal-res/law-lib/laws-by-subj/about/smoking.html
General Law Chapter 270 Section 6 prohibits selling or giving tobacco to minors
Section 6. Whoever sells a cigarette, chewing tobacco, snuff or any tobacco in any of its forms to any person under the age of eighteen or, not being his parent or guardian, gives a cigarette, chewing tobacco, snuff or tobacco in any of its forms to any person under the age of eighteen shall be punished by a fine of not less than one hundred dollars for the first offense, not less than two hundred dollars for a second offense and not less than three hundred dollars for any third or subsequent offense.
So although you may be able to get smokes easily, unless you are getting them from your parents, the person you are getting them from is breaking the law.
I also wouldn't be surprised to find out someone called DCF and reported that your use of tobacco is neglect or abuse by your parents.
There's also a law prohibiting smoking in the workplace, so although people may be smoking at work, it may not be legal.
I recently read that some town passed an ordinance prohibiting the sale of tobacco to people under the age of 21.
BTW, I started smoking 40 years ago, but stopped 30 years ago. I was a pack a day smoker, and they cost about $1/pack when I quit. Since they're now $10/pack, I estimate I've saved over SIXTY THOUSAND DOLLARS over the past 30 years by not smoking.