I would give them an example - if you have a garbage disposal and they clog it because they are putting too many things down it, its not the landlords or garbage disposals fault. 

A lot of times, depending on city ordinances,  landscape overgrowth, on the home, on the roof, on the sidewalk, garbage near or around the home,  just to think of a few things, can result in violations and fines from the city.

I leave out a lot of the other “maintenance nightmares” like garbage disposals and dishwashers, but find ceiling fans to be low maintenance.

Any calculator/formula is subject to GIGO....garbage in, garbage out.  

Pour the grease into that and once the grease has set and the can is full (ie don't use it once time, keep adding to it), put the can in the garbage. 

I also love that you take the time to sell and donate many of the items instead of just throwing everything in the garbage.

Removing all garbage disposals 3. 

The property was full of garbage, old cars, campers and boat/ trailers.

We logged the site, cleaned up the garbage, cut in a few roads and waited for the market to boom.What was the outcome?

If you want to reduce my or other peoples problem with this practice to a "sign placing" issue to minimize the fact that they are ugly and look like garbage, that track doesn't work.