Students can change their name and their e-mail addresses. Blackboard has efficiencies built into the system for those who reuse resources between courses. At the quiz and survey level, there are question pools. Tasks and events can be added to the course calendar as prompts for students. I can't see the course tasks I've created, only the events.
Further questions are welcome.
Please e-mail your question to a learning consultant. Questions of general interest will be posted in the Blackboard FAQ with their answers, those related to individual circumstances will be answered privately. .