I see people posting of being confronted by angry shoppers who accuse them of putting lives in danger.
Such a possibility really puts people off shopping without masks.
This is part of the intimidation tactics that the government is encouraging.
I suggest you have a plan ready in case your fellow shoppers take offence at your lack of facemask.
Since the guy would be muzzled already, simply shout loudly that you cannot hear him.
Keep doing so each time he mumbles at you through his mask.
Then if he doesn't give up and go away quietly, shout something embarrasing at the top of your voice.
The ideas which come to mine would be something along the lines of:
1) I don't think they sell incontinence pads here. Have you tried Boots?
2) The condoms are sold next to the toilet paper.
3) You need the toilet urgently? I think they are in that direction.
4) The time is about 4 o'clock
5) No, I don't think it's raining outside yet.
You need to be bold and brazen
What you shout should obviously be crafted according to the person in front of you.
Should the brain washed idiot take his mask off to make himself heard, well I have ideas of how to draw even more attention to the interchange to embarrass him.
You can come up with your own ideas
But it is important to stand your ground and refuse to be intimated.
And shout very loudly
It helps that I am old and quite deaf already