I don't think that bad reviews from Lina users will be deleted. That's a NO-NO for reviews. When we say that the review that is posted was based on blockchain technology, there is no way (or I may say close to "no way") to delete a certain review done by anyone. According to what I have read and understood in the Whitepaper (kindly read white paper page 9 where it says "Publish lots of quality reviews, which are widely accepted (like/agree). After reaching the specific level, the reviewer will be promoted to Helper.") This is the reason why users' reviews will be evaluated by the LInA Team, if the review was "widely accepted", meaning even if it is good or bad review but if it is "reliable" and "based on facts", it will certainly be widely accepted and may be used as a basis for promotion in becoming a Helper.