Make Up Strange British Customs
such as applauding when an emergency services vehicle screams past, sirens a-blazing, to confuse "forriners"...
(SonoraAeroClub "OH SWEET HELEN OF BALLS!", Fri 17 Jun 2011, 13:00, 3 replies, latest was 15 years ago)

I'm fairly sure there's already plenty of 'actual' customs that are enough to confuse forriners
Rolling a cheese down a hill and chasing it? Setting a barrel of tar on fire and carrying it on your back? putting a square of Kraft yellow vinyl plastic atop a hamburger and considering it an 'improvement'?
( Rotating Wobbly Hat That's not a banana. THIS is a banana., Fri 17 Jun 2011, 13:09, Reply)

I like this one.
But there are many. The "Stand On The Right" signs on the tube are merely party-political advertising.

When a Japanese businessman bows, you must rub his head for luck.

Policemen appreciate being hugged spontaneously by tourists.
( Je suis un vagabond is an unfunny, up your own arse middle class knob, Fri 17 Jun 2011, 13:46, Reply)

You don't need to make anything up to be strange.

( postal ninja has Transmissible spongiform encephalopathies, Mon 20 Jun 2011, 0:03, Reply)