Not sure how "safe" this is and thought I'd ask some people more knowledgeable than myself. I live in an apartment this year and have two other roommates. Still technically a campus rented property, but we're responsible for our own cleaning like a real apt. Anyhow, I notice that one of my roommates flushes dental floss down the toilet after he's done. I never said anything the first three weeks, but am starting to wonder about it now. Totally Safe, Possible Hazard, or total No-no? Worried about some kind of a clog. ...and possibly having to pay ourselves for a fix!