Either just a mask or maybe a full costume. Along with a note for police/security that says, "The CDC has suggested that all citizens wear masks while in public".
Some of these would surely encourage 'social distancing'...
My daughter was going with her Deathnote mask but found it pretty warm for extended wear:
She's switching over to Rorschach!
My job site requires a mask at all times so I'm ordering some to match the superhero shirts I wear every day. I'm not sure how far they'll let me push it since I'm gate security and have to interact with everyone coming on site. A couple I have coming:
I got one of these 3D printed off of Etsy and I have been wearing it all over town. I did cut out coffee filters and tape them on the inside.
I'm really only wearing this thing for about 15 minutes while I pop into a grocery store.