Sounds good to stop spammers but as well peeps without the possibility to wire the money (younger kids) or just not having the funds or .....
So I would not recommend this approach (as it would also create a layer for new members).

But what is this discussion about?
To show what could be done if we had a paid admin team serving 24/7???

PLEASE keep in mind that there are (way) less than a handful of members to support the maemo infra and keep it alive.
So any proposal should reflect this. Or get in touch with techstaff and offer your help/know-how/time!