To stay legal, I would suggest documenting everything you can and get a court order. Any type of social engineering or active attacks could be dismissed in court if not done properly in your state. Also to sue someone for libel or slander you must suffer a loss in some manner that can be quantified. (Ex. supervisor documents that you did something that you didn't and you are suspended without pay from work for a day) This would be a day of lost wages for the damages. If they are saying that you are short and you are tall you may view this as defamation of character but unless you have lots of cash to throw at them to make them miserable it's not worth it. Besides, karma will come around at some point in time, just be patient.