Masks won't give complete protection, but in high risk situations they could reduce the risks a bit. Some of us may be more vulnerable to the virus than we realise or we could pass it on to others. Is it worth that risk to somehow feel superior to the 'sheeple'. I see a lot of name-calling amongst those who think they have some special knowledge of what might be going on. What if there is no great conspiracy? Of course some governments will exploit the crisis and we have to beware of creeping legislation, but I see more incompetence than malice. It's all people rather than some master race of lizards.
I'm not going to criticise anyone for wearing a mask, but those who deliberately endanger others should think again. They are exploiting the situation to make political points that may not help anyone apart from their own ego.