Outside Shepherd's Bus tube station over weekends you would usually find people preaching the name of Jesus Christ the Holy Lord. People preach various ways: praying, rapping, singing and talking.
My friend has a t-shirt with 'Satan Lives' on the front. So Saturday afternoon he wore the shirt and went to quietly stand beside them without saying a word. It was quite funny to see. He got a few dirty looks for the preacher and his group of people but noone actually went up to him to say anything.