raedme: add a warning about "rm"

1 files changed, 9 insertions, 0 deletions

diff --git a/README.md b/README.md
index 749ae69..ff54d18 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,15 @@ then:
              Wireless interface      Centrino Advanced-N 6235
              Ethernet interface      RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
 
+    - **WARNING: Please think when using it!** In particular, writing "rm" or "dd"
+      into it could be like running around with a chainsaw. But you'd be careful
+      writing "rm" anywhere in Linux anyway, no? Also, why would you want to
+      pipe something into "rm"? Other than that, I don't really have good ideas
+      how to protect against cases like this. And in the other, non-dangerous
+      cases, I find the tool immensely useful. If you have some ideas how to
+      try to protect, [please share!](https://github.com/akavel/up/issues)
+      That said, a tool wouldn't be really Unixy if you couldn't hurt yourself
+      with it, right? ;P
 - when you are satisfied with the result, you can **press *Ctrl-X* to exit**
   the Ultimate Plumber, and the command you built will be **written into
   `up1.sh` file** in the current working directory (or, if it already existed,