Again, you're misunderstanding who the target of the anonymity is. Users on 4chan are highly anonymous to other users. Anonymity to the operators exists practic

Again, you're misunderstanding who the target of the anonymity is. Users on 4chan are highly anonymous to other users. Anonymity to the operators exists practically nowhere due to simple abuse prevention considerations. Also note that anonymity is a sliding scale, not a binary switch. Yes, throwaway accounts offer some anonymity. But they are decidedly less so than posting on most 4chan boards in default operation mode, since the default way of posting on those leaves no way for one user to identify another user. Meanwhile throwaway accounts require a non-trivial amount of effort for every single post made; which is much more than the zero amount of effort required on 4chan to have the same benefit.