Yeah, it's probably best done on the viewer-end of things. What I've started doing for people whom I know are crossposting is removing them from my default view filter on LJ, but I don't know if you have that set up already on your end, or if that would necessarily be the best solution for your situation.
It's for a friend and what I think she's going to do is set up a custom filter here on DW that contains only people who are only posting on DW, but that seems very kludgey & failure prone.
no subject
Date: 2010-09-13 01:32 pm (UTC)no subject
Date: 2010-09-13 01:33 pm (UTC)