Let them bring it down even more Kiya.
A 1:1 voting up and down at extremes produce a 5.5 rate.
(1 + 10) /2 = 5.5
So it could hardly fall below 5.5 unless the down voter spams.
Self control is inevitable now because one single up vote shall shuffle them safe.
It is very hard to manually realise down voting spam if we insert one up every 7 or 8 down.
Let them feel happy and triumphant until they get caught or until we have a strong word to say.
After saying our word we may apply new war tactics and send massive SHUFFLED up votes.
No moderator can manually delete 5000 shuffled up votes unless he was a pimp.