Anything but a comma!

I like this signs in London: they’re clear, they’re attractive, they’re to-the-point. But then there’s this, which is currently displayed all over the Tube system (see the BBC story). Are you supposed to check with other passengers or not?

What it says:

“Don’t touch, check with other passengers, inform station staff or call 999.”

Wouldn’t one of these–any one of these–be better?

“Don’t touch: check with other passengers, inform station staff or call 999.”

“Don’t touch–check with other passengers, inform station staff or call 999.”

“Don’t touch; check with other passengers, inform station staff or call 999.”