Education is required on this topic. For those in need of it, please note this definition of slander (emphasis mine):
oral defamation, in which someone tells one or more persons an untruth about another which untruth will harm the reputation of the person defamed. Slander is a civil wrong (tort) and can be the basis for a lawsuit. Damages (payoff for worth) for slander may be limited to actual (special) damages unless there is malicious intent, since such damages are usually difficult to specify and harder to prove. Some statements such as an untrue accusation of having committed a crime, having a loathesome disease, or being unable to perform one's occupation are treated as slander per se since the harm and malice are obvious, and therefore usually result in general and even punitive damage recovery by the person harmed.
I would like to point out that untruth is necessary (thus disqualifying me from slandering anyone). Conversely, name-calling and unfactual posts with the sole intent of defamation in retaliation for fact-finding are slanderous.
The Internetz could clearly use a basic update on this issue. So, just a helpful little reminder. You're welcome.