
At some point, a site dedicated to chronicling what not to wear during Christian worship must deal with the phenomenon of the clown Eucharist. These seem to occur in all Christian denominations(this one is Episcopalian).
All I can say is that if you think it's a spiritually good idea to dress like that while performing the most solemn, meaningful and important of all Christian ceremonies, you don't understand or value that ceremony and you really should start sleeping in on Sunday mornings.