Protect Yourself

Sometimes it is necessary to protect yourself! Nowadays you do things differently than in the Middle Ages. I like to use something more stringent linguistic description as wall against unreasonable demands.
fairytale castle, more than 100.000 views
photo by frizztext, more than 100,000 views – why? To remember a metaphor for protecting yourself?

read the comments with some links:
https://flickrcomments.wordpress.com/2014/08/16/protect-yourself/#comments

me playing in my favorite castle:
https://www.flickr.com/photos/frizztext/4462189082/

slide show with castle interior,
background music: me trying to play J.S. Bach BWV 1056:
https://www.flickr.com/photos/frizztext/3375877614/