Considerate
Seeing how considerate of the people around him he is, this guy found his right place! A protest is usually made for people concerned about other’s feelings. On the other had – what did you expect? You’re at a protest, not a movie theater! And it doesn’t really matter if they can see or not, as there’s not much to see anyway.
Some protest signs are clever, others are funny, but this one is just hard to explain. And can the person holding the sign even see anything? And what did he expect to see? So many questions are left unanswered.