Either way, a message is being displayed to all teleported members now on altt to have a different password.
Why? Are you assuming your users are that dumb? Everyone knows by now not to reuse passwords, and reading it again won't make the people who do it change their ways.
The direction in which this thread went, shows that not everyone knows that it is not a good idea to use the same passwords on different forums. It is obvious that this mantra should be repeated everywhere and always, like the one "Not your keys, not your coins". No matter how many times it is repeated, there will be those who make such a mistake again.