Never been to west kennet, read an awful lot about it though, seems to be a magnet for individuals and groups intent on ritual!, from the evidence ive seen on the net, mainly photos i really cant fault anybody wanting to restrict access!, honestly speaking what right do we have to enter such places anyway and engage in ritual as many do so, yes i have myself visited several sites and done so on the intention of 'clairvoyantly' gaining evidence to their past use(s).This however in no way degrades the site in anyway or form unlike the evidence shown and spoken of.
Sometimes these places need a break from us, before we break them!