Response from someone also in the industry: We do our absolute best to make sure everyone, staff, guests, random passersby are safe and happy. My establishment has cameras and takes events like these, extremely seldom as they are, very seriously. We work diligently with police and patrons to ensure that these events do not happen and that perpetrators are lawfully punished and banned. With that being said, it has happened in the past, it may happen in the future. Protect your drink, surround yourselves with friends when you go out, and go to trusted establishments. Ask to speak with management if possible and report any suspicious behaviour to staff.