There is nothing wrong with this per say although I am no fan of these pseudo salafist movements.
Being silent in the face of evil is consent, you have to speak out to discourage people and ensure shamelessness is not normalised in society regardless if this irritates the person or not.
If you refuse to do so, that's what inevitably will happen on a colossal scale as we see today which inevitably leads to all kinds of evils that will eventually effect all of us in some shape or form.
This is why sins committed in public carries such a heavy weight because it encourages others and as a result entire civilisations and societies are destroyed as we observe throughout history.
Explain why Muslim societies are ruined and West is prosperous and peaceful.