There are scrutineers looking at all tables for on this occassions both side, if it was a general election and you had 10 candidates all 10 would be entitled to have someone verify what was going on. Yes voters scrapping the barrels and not able to accept they have lost the vote. When a ballot box is opened the scrutineers are invited to check seals are in tacked, box is then opened and contents are checked. Before counting begins both would have to agree to continue. From someone that has done their fair share of electrol counting