Bitcointalk.org aims to allow about as much freedom as is reasonably possible. But this is not a darknet forum, and with mixers looking "grayer and grayer", it's no longer
reasonably possible to allow mixers to operate here with complete freedom. Even though
"a cryptocurrency mixing service is not necessarily illegal," a clear pattern has emerged where mixers pop up, last for a little while, and then get taken down by law enforcement once they get too big. It's not sustainable to have those sorts of services operating here. Therefore, there are some restrictions on mixers:
- Forum accounts that are obviously run by mixers are not allowed.
- Mixer announcement threads are not allowed.
- In signatures and other profile fields, you're not allowed to write the name of a mixer or link to a site which is a mixer or is obviously owned by a mixer.
- In posts, you're not allowed to
accept payment to write the name of a mixer or link to a site which is a mixer or is obviously owned by a mixer.
Reiteration of ban on "dark" sitesEven before the mixer-restricting rules, linking to probably-illegal (i.e. "dark") sites had been banned, and this continues to be banned. Banned dark sites are centralized services which meet any of these criteria:
1. The site openly talks about facilitating acts which would almost certainly be illegal anywhere in the US. For example, if the site says, "we will help you
clean your
dirty coins," then that is too close to the exact definition of money laundering, and it would make the site a banned dark site. (This example should be interpreted narrowly: the issue is with the specific language.)
2. The site is only available as as a Tor hidden service or on another difficult-to-take-down platform, and this is obviously because it
couldn't exist on the clearnet Internet. For example, if a site runs a stock eBay-clone script but has no rules and no effective way to report illegal products, and it's only available as a Tor hidden service, and it does in fact contain a ton of illegal products, then that's a banned site because if it was a clearnet site, it'd obviously be immediately taken down or forced to significantly change its policies.
3. US authorities have taken a takedown, seizure, or sanction action against a service or the organization behind a service, in which it's alleged that the site is engaged in illegal activity. If the site later moves to a new domain, the new domain is also banned. (But if all such official acts are withdrawn, overturned, or stayed, then the service is no longer banned.)
Definition of a mixerFor clarity, here is a detailed definition of what we mean by a "mixer". Most people know intuitively what a mixer is and don't have to read this.
Something is considered a mixer if it meets all of these requirements:
1. It has a feature advertised for taking property, improving its privacy somehow, and then returning roughly the same type of property.
a. Even though you can sometimes use non-mixers to mix coins by depositing and then withdrawing, this doesn't make it a mixer because this is an incidental use of the service; the service isn't
advertised as privacy-enhancing.
b. If a site is not primarily a mixer but has a mixer function, such as a mixer function on a gambling website, then the whole site is considered a mixer.
c. If the site takes coins, gives you a possibly-transferrable IOU, and will convert this IOU back into mixed coins much later, then the temporary conversion into a different type of property does not prevent it from being considered a mixer.
d. If the site internally converts your deposit into other things as part of its mixing, but ultimately the
point of the product is to get your original type of property back, then that's a mixer, not an exchanger.
2. It is possible for the mixer to steal property passing through it. Assume that the sender does everything as correctly as possible. Also assume that no miners/verifiers on the base-layer cryptocurrency are evil. But assume that every other actor involved is evil (everyone able to vote in a DAO, every coordination server, every counterparty, every member of a multisig, etc.). Ignore short-term software bugs which are expected to be quickly fixed.
3. The service does not collect KYC-type info from all users. (This is not an endorsement of KYC generally, or a condemnation of non-KYC services generally. Non-KYC services of other types are still allowed, and in many cases they are a good idea.)
Examples of things that are not mixers under our definition include exchangers (unless they have a mixing function), CoinJoin-supporting non-custodial wallets, and Monero.