An app that marketed itself as 4chan's tinder had a data leak. An analysis document reveals it was basically a honeypot to harvest data of 'incels' and 'femcels' setup by the EU.

Leak: https://duoleak.acid.im/
Document: https://archive.org/details/duolicious_analysis
More information: https://www.youtube.com/watch?v=IceZnv9OoYQ