My .02...
If every thread or post (or poster) which offended or agitated someone in some way was deleted, there would be no pprune. The mods do a pretty good job of keeping it relevant considering that anyone in the world with a computer can sign up and post. Some advice is gold and some is rubbish (possibly including my own), but any half intelligent adult should be capable of deciding what applies to them.
If you really want to improve the quality of your time on pprune, you would have more of an issue with thread titles than content. In my opinion, threads named “Would this work?” or “How True” or “Definitely worth the time” are the time wasters. A thread titled “Airline Cadetship vs Traditional Methods” is not of concern to me as I can instantly tell what it will be about and decide whether I want to spend any time reading it.