When Marek saw the police approaching with handcuffs, his expression darkened. He began shouting, struggling to break free. “What have I done? Why are you arresting me? I haven’t committed any crime or stolen anything! You have no right to take me away!”

The officers, losing patience, threw the evidence—a document linking the anonymous ID to Marek—right in front of him.

“Is this not your post? Spreading malicious rumors online and defaming Ms. Meyer. If you ...