I am reluctant to give this rating to anyone who is making any honest effort to communicate even if the writing and grammar are awful. Whenever I notice any revenge rating, I report it, as I do if illegal activity or violence is advocated. Quoting questionable language may be appropriate to properly review a subject, but using it for shock value or juvenile attempts at humor is not valid. Ask Advisors in the area for help-most are happy to do so. This is one area that frustrates all of us at one time or another, but ignoring the rules isn't the best way to handle this.
Personal attacks containing names are unethical and inappropriate.
They lack the means for the accused to defend themselves. Even when the names given are known, wretched abusers, I will either NH or decline to rate this type of review. For Pets reviews, I do look for some special qualities. It helps to know how well a product worked for you, how well that compares to the advertising, and whether you think it's a good value. For foods, at least a general indication of main ingredients is helpful, as is any special nutritional points about the product.