Update README.md

Explanation of rogue forks.

README.md

@@ -5,6 +5,11 @@ Chrome extension that replaces occurrences of 'the cloud' with 'my butt'
 
 [Direct download of crx file](https://github.com/panicsteve/cloud-to-butt/blob/master/CloudToButt.crx?raw=true)
 
+Note that there are forks of this extension that simply replace 'cloud' with 'butt'.
+In my personal opinion, that approach is too broad and it's less funny as a result, but it is clearly a very
+polarizing issue in the cloud-to-butt user community.  Forks are free to do whatever they like.  But officially, _this_
+extension replaces only the phrase described above. Thank you for your concern.
+
 Screenshot Gallery
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