Are groups of young men vulnerable to violent crime?
Generally, in terms of violent crime that relates to assault, both the people who commit those assaults and the victims of them are young men under the age of 21. So, yes; a male who is under the age of 21, is more likely to become (statistically, anyway) a victim of an assault or violent crime. However, the principles, again, depend on precautions, such as not rising to the bait when it is reasonable not to. If you are a group, you are less likely to become a victim of crime. Most people who are a victim of an assault would either be alone or with one person. Generally, the people who committed the crimes are drunk, are cowards and would normally be in a group of people and would look to take on people who are either in a smaller group or on their own.