of course its bad for your mouth but its not gonna kill you Mukka! Weed is bad for your lungs but that ain't stopping you. It can also lead to alot of infections to the gums, if they become too tender after smoking just take some antibiotics and you'll be fine.
Smoking "anything" within 36 hours after an extraction can create suction that can dislodge a blood clot from the empty tooth socket...That will, 98% of the time, cause a very painful Dry Socket. Drinking from a straw or small bottle or can top can do the same thing.