Julian Cope presents Head Heritage

You're missing the point, you don't need a 'mass invasion' for things (animate or inanimate) to deteriorate to the point of no return (though for the umpteenth time the 'mass invasion' of Stonehenge at solstice time is indefensible). One person a day walking round the Avebury bank will cause as much damage in three months as a hundred people in a single afternoon - it's accumulative! If you doubt that take a look at the ongoing closure of certain sections of the Avebury bank for months at a time so that they can recover.

One first sweep of the plough at the base of a barrow followed by more, one too many footsteps at Saihō-ji, one too many songbirds, one too many of anything because one too many clowns think that their little act of vandalism won't make any difference - it does. Don't do it - period.