Hi folks. Just a little infomation, because I did not know about it until lately, so I wanted to share.
If you see Trees or sign posts painted with a purple paint (see photo) look around for other trees marked, because this is the same as No trespassing signs.
http://home.att.net/~releejr/purple_paint.jpeg
Just wanted to share and see if anyone else knew about this.
Sorry about the poor quality of the photo.