This is the best tactic to win a speed chess game.

Send a long, 200 word message to your opponent. He will take a lot of time to read it. In the meantime, you make your move, and his time runs out.

a shrewd ploy indeed!

Go to their house and fart on them.

#1 Hey, remind me to turn on kid mode while playing speed chess. No comms, no time wasted reading long messages ;D

Zen mode would be enough. The only drawback I found so far is that you don't see previous moves.