The PIVX Discords are open, to those that follow the rules. What I meant was that this mixer topic has been discussed before across the Internet from many others in crypto, outside of PIVX. We can't force people to copy their chats into platforms not intended for chats, but for topic specific conversation, especially when they don't even know about PIVX. Last time it was discussed at length in PIVX (that I am aware of) was when we were going to develop zDEX, but then 7 decided it was his personal project. It never went anywhere.
You do keep mentioning 'closed group'. There isn't one. There are open groups with reasonable rules. Breaking the rules has consequences. Besides, this is a FREEDOM and PRIVACY focused project. People are FREE to have PRIVATE conversations, or public, but only in their preferred platform if they wish.
The exchange/swap functionality you are asking for, is a huge amount of work, already being done by others (Basic Swap etc.) and would have unique challenges like liquidity pools etc. that are very difficult and expensive to solve.
I don't think it is good enough to 'set this up in another country' as the USA reaches globally, and we can't prevent people from using it from other countries, without doing KYC, which we're obviously not going to do.