I dare say that there are many, many people who genuinely consider their tree to be correct in every way! Of course, with the ability and the rights to copy from other available Ancestry Trees, then it all becomes a bit of a land mine, and everything taken as gospel by some who are just starting out.
The important part for me, and I'm sure that as with all of us on here, is that my material is well researched, well sourced, and as accurate as I can possibly make it! And my tree is private!
Having said that, I believe that we need to accept there will always be mistakes, sometimes in our own, sometimes those of others, but the thing is, they're other people's ancestors too, and if the info from the hints makes them happy, it's no skin off my nose now.
If and As they carry on researching and developing their trees, their knowledge and skills should surely develop, just as ours did, and with any luck, they will want to delve a little deeper that just picking a leaf off here and there when they're waving around in the wind!