Do you have something to attribute the use of makeshift masks and bandanas to flattening the curve? I've been looking.
https://www.thelancet.com/journals/...6736(20)30551-1/fulltext#.XoCx1cGa7kI.twitter
That looks into why countries that are flattening the curve might have been successful in doing so. Information about the effectiveness of makeshift masks seems scarce but concerns around people having a false sense of security and being more lax in social distancing seem to have more grounding than being bullshit. We're not talking universal use of N95 masks and makeshift masks from clothing can be poor when they're not sealed and reused. Is there anything substantive around suggesting universal use of them by all would have a positive impact?
I posted it on the last page in response to someone else as I keep seeing people allude to the fact that makeshift masks and the flattening of the curve are connected. The WHO advice is the same as that which you're suggesting has led to an increase in infections:
WHO's guidance and advice on the use of masks to protect against and limit the spread of COVID-19.
www.who.int
Plus that's talking about proper masks, not makeshift ones from items of clothing that don't form a seal and are likely to be reused.