First of all, I mean not exchangers like Binance, Kraken, Poloniex etc, I mean non-market exchangers like in this (_ttps://www.bestchange.com) and wallets with internal swap like Atomic Wallet and many others.

After US law about KYC/AML was adopted a lot of exchangers accepted the rules (because they work with market exchangers like Binance). And some of they block exchanging, steal funds and don't make a refund, they pretend allegedly a crypto transaction is from "darknet", but they don't even tell what method/system they use to detect the "dirt".

It is unnormal because they may block every exchange they want without any problems. If they want to get ur funds it is enough to say that transaction is dirty and it is not necessary to give any proofs.

So I offer create a blacklist of non-market exchangers that steal your money without any reason.