Thing is, if that is not public knowledge, then how is anyone supposed to know and given how the history with "Give me your email address" has let to spamming, mabe another avenue could be found, so that things like this do nothappen.... I mean you no disrespect as it seems you did have good intentions and I apologise for my reaction..but I may not be the last to do this......

Maybe a better invite generator can be found, like when accessing the App, setup account, Verify email, invite sent ?