Iwillnot, who spoke on the condition that I not use his real name, has been interested in stickers for about a decade. Stickering, like spray-painting graffiti, is against the law, punishable with a fine of up to $1,000 or up to 180 days in jail. (D.C. police say officers arrested 31 people for graffiti in 2017 and six in 2018. They arrested zero for “posters,” which includes stickering, in 2017 and five in 2018.) His trademark sticker — each artist has one — is a black-and-white line drawing of his left hand with “I WILL NOT” written below it. He often sticks it near businesses and buildings that, as he sees it, are contributing to gentrification, like cupcake shops and luxury apartment complexes. “It shows my unwillingness to participate,” he says.