Is it really a crime to stare?

‘A sky full of stars and he was staring at her’ is a love poem by a dead Roman but on the London Underground, all a man will find if he looks skyward is a TFL advert warning him if he stares at me in an Attican fashion I’m to call the police. ‘Staring’ (Sadiq Khan’s bright red public safety warning reads – with ominous eyeballs popping out of the ‘a’ and the ‘g’) that may be construed as ‘intense’ and of ‘sexual nature’ is now ‘sexual harassment’ and ‘not tolerated’. Should anyone ‘see it or experience it’ they are to text the British Transport Police or dial an 0800 sexual harassment