If I click on a user who has left a Remarkbox comment on my own site, I see all their comments from Remarkbox. That is, all the comments they have made using Remarkbox anywhere (I assume).

So if for example you go to my post here and click on Russell's username, you'll see all his comments on Remarkbox, but shown as if they belong on my site.

Seeing all the comments a user has made on my site would be reasonable, if probably not what people would expect. But the the current situation seems like a privacy problem, as well as potentially being very confusing.