So says you. God doesn't need you or me to tell him the contents of a person's heart.
Aren't we meant as a testimony to others?
These people are making their testimony in a way that they think will be understood by the people they are testifying to.
All we can do is what we think will be pleasing to God. If that is done in good concience the spirit will sort it out.
So how does Madonna wearing one of the shirts fit in exactly?
No. So says the Word of God.
"All things are lawful, but not all things are profitable. All things are lawful, but not all things edify. Let no one seek his own good, but that of his neighbor." 1 Cor 10:23-24
"Give no offense either to Jews or to Greeks or to the church of God; just as I also please all men in all things, not seeking my own profit but the profit of the many, so that they may be saved." 1 Cor 10:32
"God doesn't need you or me to tell him the contents of a person's heart."
I'm not judging the content of their heart. I'm judging the content of their T-Shirts.