$ git clone http://github.com/zorchenhimer/dumbtext.git
$ cd dumbtext && go build
then
$ ./dumbtext you sound like an idiot
YOu sOuND liKE an IDiOT
or
$ ./dumbtext -i input.txt
WHaT thE FucK dId YoU juST fUCkiNG sAy ABoUt ME, yoU liTTle [truncated]
or
$ cat input.txt | ./dumbtext
WHat THe FucK diD yoU JusT fUcKiNG saY AbOUt Me, YOu LItTLe [truncated]