I once wrote a java script text flooder that sent 1000's of texts to a phone number so bad it jammed the entire OS and rendered it useless. You could send something like 'give me a raise and stop slaving me or the great flood continues, begin to gather animals'., something along those lines. My wife's reaction was priceless too. The script prompted for carrier, phone number, and how much to loop.
I was surprised the carrier didnt block the flood.