If we get great compliance for #masks4all using a mandatory approach, will people wear them correctly?

How will misuse impact any potential efficacy?

I support ppl who wear masks in public (not anti-mask)
http://thesgem.com/2020/05/sgem-xtra-mask4all-debate/
@CaulfieldTim @jvipondmd @jkwan_md @NightShiftMD

These are disturbing videos and it raises my concerns what will be the net impact of #masks4all https://twitter.com/AnandWrites/status/1263818537132531714?s=20