I want to ask about are you using real personal email address on bitcointalk or invalid - temporary emails?
For me, I have been using my original personal mail for the forum. Even during the registration I have used this mail as well. Because I care about my account, in case of a hack or locked account, I must have access to the registered mail. So I decided to use my personal and original email. Though I had changed my email later, it was an issue to receive notification when someone PMs. So again I changed my mail with the original email that was registered with. Just hide the email from the public.
Should I also change to invalid one? For safety reason.
You can change, as I said above you may missed notifications when someone PM you. For safety reason hiding your email would be an option as well.