This is a privacy nightmare. Maybe its a cool project to think for OP, but these are real chats of people and the whole idea of E2E encryption & private nature of information is defeated the moment one indulges in such a webapp. There is no guarantee how much PII is retained on the server. Edit: Looking at all the green accounts praising the post, I think @dang should check if these involve a voting ring.
I thought a lot about privacy while building this. Tbh nothing can be done to satisfy all the critics but I have tried to do all I can. That includes open sourcing the code and not having a database at all. It doesn't collect Metadata as well.
Consider submitting the source code GitHub repo instead of some running service.
In the repo, have example exported data that are used as input and generated output.