SeX makes street art with his Unicode-special domains like █════██████████─────.tk, ☺.tk or ๏̯͡๏﴿.tk like above. He claims to have made 700 000 painted signs since 1993. Also check out the longest e-mail address (2002).
2024-update: he’s still active, with a very fragmented net presence, for example on Facebook. Also see his Vimeo.