Found by a Stratics user on UO.com, not something that most people would know so we figured we'd let you know...
Invalid Harassment
Any use of the harassment tool that is not at all related to harassment, or is simply an attempt to get ahead in the GM queue, will be considered Invalid Harassment. We understand that even these calls can be the result of unintentional mistakes, and we will generally allow players a free instance or two without punishment. If the tool is being consistently and blatantly misused, it is possible that the player submitting the logs will receive a warning or temporary suspension.