metal band t-shirts to bowling.
I generally wear band shirts most of the time. I have many that are not offensive and/or secretly offensive but nobody can tell unless you really know the band (and the bands I listen to are a pretty tiny minority of overall metal bands) so I usually wear those when I'm in polite company. Polite company, to me, is the general public and people who may or may not be offended by my music but they have the decency to not proselytize to me so I don't go out of my way to fuck with them.
But once I've been polite about telling them no-thanks and they persist in preaching, they get the Goatwhore and Acheron and Nunslaughter and Aeon and Entombed and Dying Fetus shirts that specifically call out xtianity in vulgar ways. I usually reserve those shirts for concerts of other bands where everyone is cool with it but persistent preachers can have a taste.
SO I won't wear my "FUCK YOUR GOD" shirt to the grocery store but I'll happily wear it to a religious ambush. Or an Impaled Nazarene concert. 
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