I've been laughing to myself every time I see these posters.
They're a web find from Etsy sellers Bexpert of nautical code
flags and their meanings.
Maybe I have a deranged sense of humour, but
don't you think they'd be hilarious t-shirts?
Nothing like clearly stating your intentions...
Just running that up the flag pole ;)
If they tickle your fancy, you can find them here.