Now that several servers from several markets have been imaged by authorities, with the resources available to them and the generally poor condition of SR2, it is possible that they could retrieve log in information.
In other words, if you use the same username and password on any of those sites, that you use on Agora or some other marketplace, it is possible that law enforcement could access your account.
If you are a vendor, this could be potentially terrible news. Law enforcement operated XanaxKing's account to find people lower in the supply chain.
Change your passwords.
If you have used the same username on SR2 as other sites, it's probably best to ditch that username as well.