What these things all reinforce is that a lot of programmers take text encoding as a given, and don’t realize all the potential places for errors to sneak in.
Could be a fun way to hunt for buffer overflows on internal shipping services. Just fill out the sender name field to just "óóóóóóóóóóóóóóóóóóóóóóó" and let it expand. If the parcel arrives, not vulnerable. If the packet doesn't arrive, you've found a vulnerability... somewhere...
http://i.imgur.com/4J7Il0m.jpg
What these things all reinforce is that a lot of programmers take text encoding as a given, and don’t realize all the potential places for errors to sneak in.