I read Peggie Hall's advice years ago and have been using single ply Scotts brand toilet paper without issue for ten years or so.
I've heard of people bagging used toilet paper, I even have a friend who used to do it. That's pretty gross and I wouldn't do it myself or ask anyone else to do it.
I do keep small plastic baggies and paper bags for female guests who might be using products that can't be flushed. Put it in the plastic baggie, zip it shut, then put the plastic baggie in the paper bag and close it with a rubber band, then put it in the trash.
At my age, I seldom have guests with that problem and when I do, my wife gives them instructions.