"You can always tell a Milford man" is a recurring quote in the Arrested Development episode "Public Relations".
A Milford man is a graduate of the Milford School, a school which boasts the motto that children should be "neither seen nor heard." Buster is a Milford man, and he is immaculate at blending into his surroundings. ("Public Relations") Buster can be seen hiding at Lucille's party for G.O.B.'s wife. ("Best Man for the Gob")