Case #2: New York "sanitation" police tracks author of posters using phone number, knocks on his door, issues three summonses for $50 each. Poster was invitation to write in community newspaper.
Case #3: New York "sanitation" police delivers five summonses to owner of restaurant hosting a poetry reading. Owner lent space to neighbors, who put up the posters.
Case #2: Eight people, publishers of eight community newspaper, went to fight the summonses in a hearing. Finding there was no other way out, and knowing a the law cannot be enforced without proof, they denied having put up the posters, and the case was dismissed.
Case #3: not yet resolved, first hearing was unresolved and adjourned.