That’s debatable, IMHO. I’ve arrested MANY crackheads. Their teeth are mostly fine. Perfectly healthy rich people get their teeth filed down for veneers all the time. It is a huge assumption that crack-use caused his teeth problems. But they need to say such things in headlines so people will click on the link and the website can make their money.
Smoking crack is probably less damaging than when it is rubbed on your gums.