Just to measure whether or not they could have made the same point with just Tee shirts, let me ask this question; What would you have posted had they not gone topless?
The answer, of course, is nothing, as no one would have noticed.
Nope, just as a boisterous Trump is carrying much of quiet Cruz’s unheard message on his way to the White House, while Cruz molders in the back half, these gals knew how to make their message heard.
To answer your question, I would have applauded their courage.
Your assumption that no one would notice is just that. An assumption.
A wrong one.