They are from Gideons International, organization which uses witnessing tactic of giving away Bibles in hotels, sidewalk etc. Quotes from Baltimore Explorer,
“Officials cannot use fear of arrest as a means of bullying law-abiding Christians into silence,” Cortman said. “These men broke no laws when they decided to communicate their message on a public sidewalk.” (Link)
Off course, we would not feel the pain until it burns us.