Guardian: Three weeks ago I decided to record my interactions with the police. It seemed like the most obvious and sensible thing to do as I was beginning to understand their sinister tactics. Indeed, fellow members of Plane Stupid told me that I as not the first from our group to have been recently approached by officers. Over the last six months Plane Stupid has been targeted by a campaign of police intimidation and intrusion. Some of us have been approached and menaced to inform on the rest …