You will never be required to give away personal information during a test, unless the test requirements specify that previously. You can always use a temporary e-mail address at mailinator.com if you must verify the e-mail during a test's sign up process.
If you feel a test has asked for personal information and didn't specify that in extra requirements, it's okay to quit the test and contact support. In the case of a test whose requirements were misrepresented, we will still compensate you 50% of the test's amount.
Please pay attention to the extra requirements: if the test specifies that you'll need to input any sensitive data and you do not complete the task, then your test may be rejected and you will not be compensated in this case.