He is Theo de Raadt. 'Nuff said.
Random Notes
"Vulnerability in Theo's Asshole" - http://archive.netbsd.se/?ml=openbsd-misc&a=2005-08&m=1258610
Theo de Raadt quotes - http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/usr.bin/mg/theo.c?rev=1.98&content-type=text/plain&only_with_tag=MAIN
Theo vs the Patagonian Giants - http://archive.netbsd.se/?ml=openbsd-misc&a=2005-02&t=691712
"I don't know what went wrong in Theo's life to make him such a whiny, raving sociopath..." - http://www.fooishbar.org/blog/tech/theo-2006-05-04-14-21.html