The phrase "in the wrong hands" means that something is in possession or control of someone who is not trustworthy, responsible, or capable enough to handle it properly. This expression can be used in various contexts such as referring to a dangerous weapon being in the hands of criminals, sensitive information falling into the wrong hands (e.g., data breach), or an irresponsible person having access to alcohol or drugs. The phrase conveys a sense of danger and potential harm that can result from misplaced trust or negligence.