I do not like the use of "sacrificial cave" however it is a fact that certain caves "Goatchurch, Mendips" lend themselves to a high level of cavers, especially Novices. Us, You, as leaders can educate as best you can novices before entering any system, unfortunately what we cant do is have eyes everywhere at all times and actually stop 1 idiot doing something completely against all what you have spoken about (cave conservation) so the likes of Goatchurch get spoilt from the weight of numbers, even if every person went down was 100% conservation minded it would still not stop the wear and tear shown.
It has also been demonstrated many times that locks, permits, warden lead, and other permantation you care to think of leads to perfect cave conservation, HLIS being a prime example,
there is in my mind a place for drone technology to be used in caving, however we do need to be mindful that the driver (is the right word?) needs to have the right level of expertise,
there is plenty of things and advice on how we as cavers should/can limit the damage we cause, and those that put this high on there cave ethos need to try and make other cavers value this ethos as well.
common sense is a great word and unfortunately has a different understanding from individual to individual
Bob is also right in climate change, who knows what will happen in caves in a 1000 years time and what we have done today will effect it then, as humans we not done a good job in looking after our planet.
in the end there is only one true conservation for caves and that is no humans allowed,
obviously that not a realistic option.