Why are the news items not moderated against scam links

I know there is this thread, but it's closed: http://boards.euw.leagueoflegends.com/en/c/events-tournaments-en/ndsehojK-free-skin-links-scamming-and-phishing Why are all the spam comments on every single announcement not being deleted? They have an army of bots to upvote their scam links and downvote anyone else. This has been going on for months already. http://euw.leagueoflegends.com/en/news/champions-skins/skin-release/loves-true-test http://euw.leagueoflegends.com/en/news/game-updates/features/retiring-dominion Example: http://i.imgur.com/w52vG9b.png
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