If You were dealing with an abusive customer on the phone, it's important to hang up right away. (True or False)?

False. Company or business representation is very important no matter how badly customers behave. 

When handling abusive customers you need to show a level of maturity and professionalism to be able to converse with the customer and convey your willingness to help them but at the same time set boundaries that would dictate the flow of the conversation.