Security at the convention is designed to keep the attendees safe and everyone happy, but they can not act as your personal body guards. If you are merely concerned about a particular person, we suggest you avoid that person as much as possible. If you are directly threatened by a person (verbal attack, attempted physical attack, inappropriate physical contact, etc.), contact security to report the incident and they will advise you on what can be done about your particular situation.
If you see someone doing things that don’t seem right (especially anything in violation of convention rules or city/state laws), notify security immediately and let them deal with the situation. Anyone violating convention rules or city/state laws will be dealt with appropriately, which could include revoking membership privileges or being handed over to local law enforcement if necessary.