it's literally half of a percent
Ok? so because
you don't think it's a big deal, that means it isn't? vote brigading is antithetical to ratings websites, regardless of what impact it has. it's just low-profile shilling.
edit: the reason I care about this is because I am extremely active on rateyourmusic. this stuff distracts from discussion about releases and puts the focus petty politics surrounding the release. "Why is the average so low," "how have people seen/heard this? has it leaked?" and so on. If the politics surrounding a work are relevant then its worth discussion, but vote brigading isn't interesting, it's just reactionism that hurts the website. it's annoying.