[the_third_wave]

No tinfoil hat needed to see that certain users attract a larger share of upvotes for a given statement while other users attract a larger share of downvotes for other given statements. The same is true for certain subjects but that is just a reflection of the ideological makeup of the site's population.

It is also noticeable that downvotes often come in clusters where a given post suddenly gets downvoted several times within a short time frame where there otherwise has not been any activity around that post. Whether this is caused by a bunch of ideologically-aligned users having some downtime - Compiling - or something more nefarious like sock-puppet accounts being used as ideology amplifiers is not clear and can only be investigated by Dang et al.

The up/downvoting system is one of the less successful aspects of HN, especially where it concerns downvotes. A meta-moderation system like the one used by Slashdot of old could be of help here but I suspect the site owners prefer the simplicity of the current system over one which, while more 'fair' does have the tendency to keep growing with the meta-moderators being moderated by meta-meta-moderators until it is moderators all the way down.