Or if they use something like wet wipes, hope they don’t flush them. Those are NOT meant to be flushed and are wreaking havoc with plumbing/septic/sewer systems...
Septic tank pumping companies love "flushable" butt wipes. Everything that goes into the poop tank is supposed to eventually dissolve and pass through the filter out into the drain field. Once the filter clogs it's another couple of hundred bucks unless you're a do-it-your-selfer with plenty of disinfectant and a stopped up nose.