My point is just that confiscating yoghurts and water bottles is mostly a theater, a show, to make people feel "secure".
A common, but lazy and poorly thought out statement. AQ attempted to bring down aircraft in 2006 with liquid peroxide explosives, and that knowledge wasn't lost merely because the perpetrators were brought to justice. So liquids have to be screened. Confiscations only happen when people can't follow simple instructions.