I value everyone's opinions (some more than others). +'s and -'s are okay for validation or rejection of your idea, however I appreciate someone replying to me and stating why I'm wrong or they disagree, rather than giving a - and leaving the thread.
As phew, jona and Joker alluded to, I consider a "-" from Kaoklai to mean that I am most likely correct in my assessments or opinions.