All dark type is quoted from the article.
White type is my paraphrasing or opinion. For ID' or 'this is' is redundant. If you are monitoring an ongoing conversation and wish to join in, just throw in your call sign between transmissions. You are giving your call sign not to identify yourself as much as to gain access to a conversation. . . . If, once you have gained access to the conversation, you don't give your call sign after every transmission, you may soon reach the 10 minute limit.