If I'm in an area that I think my blind might be stolen, I use a dog Runner cable Through the Windows hand around the largest tree nearby. It is 8 inch cable weatherized ans a padlock. never had one walk away that way.
I use ameristep doghouse blind, ameristep spur blind which are also the memory hoops but much more portable, but what I would like to have is called a ghost blind. (Mirrored. Use it anywhere, even open ground.)
edit to add link.
http://www.cabelas.com/product/Ghos...xunX9BANs08AaAgyu8P8HAQ&gclsrc=aw.ds