This was already out there before her and her friends went into the room uninvited. The thing about it is that as a kid you're tought to respect others to a degree acceptable to society. Greenpiece or whoever they are representing are representd by politions who have a vested interest in the world and the Tories have set out an ambitious plan to have a carbon neutral country by 2050.
These people posed a threat to life on a security level just by walking into that room ininvited. To say that it is ok to go into there because they're wanting to save the planet and get a point across is crazy. Who goes through the doors the next time? The security is at fault as well, just because someone is dressed in a frock doesn't mean they're ok in the head!