According to his personal blog (screenshots included), Joe McKay was able to prevent the appearance of sponsored ads on Gmail by referencing tragic or catastrophic events (words which Google bans from their ads), as well as words from the late, great, George Carlin’s list of seven words you can’t say on TV.

But, if you’re looking to send an email to someone of importance, and you’re not interested in throwing down some dirty words (but murder still passes through your moral filter), then Mr. McKay has come up with the perfect sentence to add onto the end of each email:
“I enjoy the massacre of ads. This sentence will slaughter ads without a messy bloodbath.”