This is the sign for the security line. It appears that an Irish guy helped them translate it.
When you get there you put your bag in a tray just like you would at an airport. And you walk through a metal detector just like you would at an airport. But instead of x-raying your bag the guy just takes a look inside. As I was getting into the elevator I got my first of many warnings about pickpockets.
This is a warning to make sure smokers don't light the filter end of their cigarettes I think.