Great suggestions which really should be added officially to this page, @aristonomia, if you have time and if there isn’t a similar suggestion already:
Here you can post your idea, which then gets upvoted (or downvoted) and by the number of votes gets prioritised on Viki.
Temporary solution is to tag the “reviews” as spam. The more people tag something, the quicker it gets deleted from the system. We have a thread for these things, when you need help tagging.