Many countries that have lifted their lockdowns and are now requiring masks in the post-lockdown stage, require those masks to be worn only on public transportation or in shops. Overall, public-health authorities do not believe that people pulling down their mask in the open air to eat or talk on their phone, will significantly change the infection curve for the worst.
Let us remember that the public-health goal here is not to prohibit any and all behavior that could potentially, under very ideal circumstances, result in transmission. Rather, the goal is to institute a few general rules that will flatten the curve to the point where contact tracing is effective. People should heed their local authorities on what to do, but I am troubled by the moral panic where posters such the above are insisting on even more stringent behavior than required by the public-health authorities.
With regard to hand-washing, touching things is now seen as so relatively unlikely a form of transmission, that some countries which initially required supermarkets to provide gloves and hand sanitizer, have decided to lift that requirement (while keeping the mask requirement). Of course hand washing in general is a good thing, but authorities in many countries do not think that obsessively doing so will make a real impact on COVID-19 transmission rates across society.