Do you ignore comments to your link? That's really what I decry. As long as you respond to comments then I think it's okay to post links.
I like how SN currently has it labeled when posting:
Link or Discussions
Sometimes a user whats to spur on a discussion and other times it is just "hey here is a link that might be interesting."
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Interesting things cause discussions. If it's not interesting enough for the probably poster to actually engage the discussion, maybe the link wasn't interesting and it didn't need to be shared. This is a social website.
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