I usually use either a wash cloth or a net pouf ( they are often called sponges, but they aren’t really.) I find they work better than my hands for body wash/shower gel , I can use the long ones with handles for my back (where my hands dont reach) and the exfoliation helps the little bumps on my thighs.
We always close the lid on the toilet. That’s got to cut back on the problem.
I’ve got a couple of cheap poufs I like. I also have some antibacterial soap I do NOT use for regular washing, but break out for certain things, like washing wounds, handwashing before food prep when I am sick, and washing occasional extreme grossness. I wash the pouf out with it every couple of days, and let it dry soapy, then rinse it thoroughly before the next use. I also throw it in with the towels and sheets every few weeks, where it gets washed on hot with a tsp of bleach in a full load.
Kitchen sponges respond well to microwaving. Leave them a bit damp with Dawn and water and nuke them for a minute and 15 seconds. The hot vapors also help clean the microwave.
Or spread the goo!! Gah!
Where is my gallon of bleach.
We’re fond of those ubiquitous yellow sponges with a green scrubby side. They start off in dishwashing service, and once they get a bit used looking, one corner gets cut off and they are designated for countertop wiping. A while later, another corner is cut off and they clean the floor around the cat bowls, until finally another corner goes away and they get one last gasp use in the bathroom and are discarded.
Weird though?
Maybe I don’t ask about loofah use enough but I don’t hear much about that as a cause of folliculitis. (Which generally goes away without treatment.)
And aesolized toilet water? We must be just missing all the horrible E. coli pneumonias or even colitis episodes from it. 
I completely get extra caution for those with compromised immune systems, including diabetes. But to my thinking the bigger risk for those cases is any tiny but multiple breaks in the skin that a loofah, even a sterile new one, can cause. Not as much as shaving but still. The skin has a thriving microbiome chock full of bugs.
And the buggies in your own toilet are generally the ones already peaceably living in your gut. As @DSeid says, as long as you don’t have open wounds, they are pretty harmless to you.
There are foreign bacteria in your kitchen that hitched a ride in on your food. Most of those are harmless, too, but if you are unlucky there might be nasty ones that won’t live peaceably in your gut.
I liked the article in the initial post. I began using loofahs last year and have bleached them once a week but have always been reluctant to trash them. I’m making a tighter disposal schedule now.