It seems to me that the only people wearing Covid masks outdoors these days are sketchy characters who just want to hide their faces. I'm thinking of the young guys who zip along the pavements on children's bikes. The fact that they're riding on the pavement suggests that they are not the most socially responsible members of the community. More likely, they are simply using Covid as an excuse to wear a mask. I wonder if they wear their masks when they steal the tiny bikes they favour from small children.