Working in London, there is no shortage of drunk, mentally impaired people who walk the streets babbling incoherent nonsense while p*ssing their stinky kecks. Now these people provide no end of entertainment when i take my coffee and watch them pass by, shaking their heads, dribbling or chatting away to their invisible chums. Where i work, there is a harry ramp who argues with himself on a regular basis and is known to stand stock still and stare into the sky. The other day, i was watching this chap on CCTV, walking along chatting to a pigeon that was moving along the pavement, until he came level with the massive electronically controlled sliding doors we have in our loading bay. As he walked past them, i opened them and they stayed level with him. When he stopped, the gates stopped. When he walked backwards, the gates followed him. He walked forwards again, the gates went with him. This utterly perplexed him. He shouted something, so i shut the gates fully. He walked off shaking his head and was last seen on CCTV rifling through a bin. This evening, he came back. As he got level with the gates, i started the whole thing off again. He is at present standing over the other side of the road just staring at the gates. I am trying to get some sort of microphone/intercom set up so that the gates can talk to him. The question is, am i messing with his already befuddled brain? Could this tip him over the edge? Is this wrong what i'm doing? Do any other Arrsers mess with these people in the same or a similar way?