I’ve been toying with this idea at well. I don’t think it’s a good idea to scrape all content. This could drown out the lemmy-original content, especially when large subreddits are concerned. Maybe an upvote threshold (Only scrape if more than X upvotes) would be a good idea.

I would also scrape only the post itself, not the comments. Best to have our own organic discussions here.

Finally it should be very clear that a bot is posting these things. Ideally the bot would also ensure it is not re-posting something that was already posted by a Lemmy users just a bit earlier.