If anything, shouldn't it be encouraged, and even automated? I'm including even the 'old' stuff from reddit here. Reddit shouldn't be the absolute owner of the content submitted by users. When I migrated here, it wasn't because of me being against reddit users, but being against reddit the company. Copying the content here actually hurts the company in sense that they don't get to then gatekeep the crowdsourced content.
Not automated, but if you see something there that brings something on the table, by all means post it here. There's nothing you can really steal from Reddit, and even if there was, go ahead and make it impossible to catch you. Companies like that don't deserve any considerations from regular guys like us.