Posting these kinds of Articles on NH can lead to someone wanting to read more lwn articles and pay for it or be forced to dig through the web for premium links
Almost anywhere. Private mail, messages to project mailing lists, and blog entries are all appropriate.
sounds very different to me from HN, one of the most trafficked tech news aggregation websites
"Certainly I don't want large amounts of our content to be distributed this way, but an occasional posting that puts an LWN article at #1 on HN is going to do us far more good than harm."
You specifically have done this at least a couple of times recently.
Congratulations, now go bully someone else.
Anything beyond the initial (presumably well intentioned but mistargeted) raising of the LWN note reads as an attempt at policing the policies of both HN and LWN by haranguing.
In fact IMHO it's the very opposite of "As long as people do not use subscriber links as a way to defeat our attempts to gain subscribers"