i, too, have thought about it recently. something to mark a change. i even have a design in mind. and i'd put it on my upper arm - where it could be seen - but not all the time and not too big.
my wife and kids and boss and friends and co-workers would all be totally shocked. they would all think it was completely out of character. maybe that's a good reason to do it! like saying - you don't know as much about me as you think.
How long, LORD, must I call for help, but you do not listen?
Or cry out to you, “Violence!” but you do not save?
Why do you make me look at injustice?
Why do you tolerate wrongdoing?...
Therefore the law is paralyzed, and justice never prevails....