https://en.wikipedia.org/wiki/Honeypot_(computing)
A honeypot is a decoy used to attract malicious activity, keeping it from legitimate targets, and accurately identifying it.
Honeypots are deliberately promoted in such a way that legitimate users will not find them, but criminals will end up harvesting their addresses. For instance a honeypot e-mail address wouldn't be offered to legitimate users as a contact, but only buried in some content where only a spammer will harvest it. When the criminal uses the decoy identifier, their connection attempts are subject to time-wasting pauses (the honeypot is "sticky"!), and their IP address is put into a blacklist at the same time, so then the have a hard time accessing non-decoy resources.