They're not even US based so that have no obligation to report to the IRS or DOJ.
This is just FUD at its finest..
Do you think legislation in other countries will differ much from that in the USA? If they are not the same today, they will be in the future. Even casinos, which are licensed in tax havens like Curaçao, i.e. not US based, have anti money laundering and KYC requirements.
In the EU, this kind of inter-cryptocurrency exchanging is completely fine, since there's no on or off ramps involved.