in this day and age (internet age), the only persons who believe that marijuana is bad for you are either ignorant or stupid.
no one, in the history of mankind, has ever died due to overdose of marijuana. no one.
as what the other posters have said, it's ok to smoke marijuana, wag lang sobra.
marijuana has no addictive properties but you can get addicted to it (just like you can get addicted to dota).
on a final note, if you do smoke, smoke responsibly and be extra careful. mahirap na ma-"stoner move".
ok? good vibes.