wearing an upside down cross can have a double meaning...either the cross of St. Peter to suggest we sinners are not worthy or to honor evil.
HOW MANY have you come across who honor Peter with an upside down Cross? I don’t know any. Qx doesn’t know any.
True. We don’t see that much in our country, however there are many places where the inverted cross is displayed in honor of St. Peter. This link shows a few of those.
http://www.aeromental.net/2010/08/27/the-inverted-cross-is-the-symbol-of-saint-peter/