Actions of grief committed towards another resident can be considered abuse, especially if those actions are against the TOS and/or CS. An abuse report (often referred to by its abbreviation, AR) can be reported through Help -> Report Abuse... be sure to provide as much information as possible. You could also save yourself the trouble of taking the time to fill in an AR and just leave the area, because Linden Labs almost never does anything about it. Reporting false abuse is also a form of abuse. Cases of abuse are reviewed by Linden Lab Customer Service. Any penalties are enacted by liaisons unless the resident may be banned, then the record of the accused may be anonymously brought before a randomly chosen panel of other residents who will give input on their fate.