As long as you keep my name, the original link, and my Twitter handle attached to it, you can reprint or read the letter to whomever you want, without alteration, as long as you don't charge anyone to read or access it. You may translate it into other languages if you'd like (someone's already translated it into Indonesian, with my permission!). Here's the attribution info to keep attached:
Magda Pecsenye /2013/03/a-letter-to-my-sons-about-stopping-rape.html @AskMoxie
Here it is as a PDF, so you can print it:
I'm so glad this has struck such a note with people!