NP! I can promise you, we aren't using passwords for anything other than the purpose of import and/or crosspost (it's in our privacy policy, even), but I totally understand being nervous, especially since you don't know us and we haven't had tons of time to earn your trust. (I mean, I can tell you that the idea of violating someone's privacy like that makes me need to go take a shower, it makes me feel so unclean, but anybody could say that!) If you are at all concerned, it's best to change your password to a throwaway pw, run the import, wait until you get the 'success' message in your inbox (that's important; if you change it mid-run, subsequent steps will fail), and then change it back or change it to something new.

Welcome back to DW, by the way!