Let me guess, older gray haired gentleman posting in those groups?

If the tenant clogged the line at the first trap with hair or food/grease, or jammed the disposer, that is 100% their expense (I make it a point at move in to be sure they understand how to reset and how to use a disposer wrench to solve 95% of disposer issues, saving them the cost of a plumber forever when those issues arise).

It is mostly semantics in this thread, splitting hairs.

As to what Steve says that is what you need to do.Take emotion and being upset that another human being would do this to you out of the equation.Follow your local landlord tenant law steps.Do not deviate and document everything.I know you just wish to do what this guy says to get him out of your hair but it will come back to bite you later on.

They can go do all that hair brained stuff on their own time. 

I just about almost pulled my hair out with that bunch that wanted to run things like they owned it. 

So I thawed it out with wife's hair dryer... and then the water started spraying.

Find something easier to manage Ashraf I am afraid you will be tearing your hair out with this one.

They should take pictures of anything out ofthe ordinary and report to police.My wife's hair salon got tagged with graffiti.

That's just a hair over $2000/unit, which is a very small renovation (flooring and paint at most)