Eeeek!
http://www.themodernantiquarian.com/post/26123
<blockquote>Some absolute mindless tw*t(s) seem to think its a good prank to have splattered bright yellow gloss paint over the entire ring in some cases both sides of the stones. Damage was found this morning by a member of a geo-phys team arrving for work. The oldest measured lichen colony in the UK has a line of paint running down it plus splatters.</blockquote>
This isn't an April Fool as it was posted to the Stones List by a member of the Rollright Trust.
Bastards.
H