At the demo account there are these receiving address:
*Active*
1C5LqLaDJRFf2jRpMKh9ErZgpjDB2DK7Z1
Main Account - 1HB5XMLmzFVj8ALj6mfBsbifRoD4miY36v (Watch Only)
Donations - 1PkHvfna7fHNi1BnbYjFe5tRDLQZqLYLyz (Watch Only)
1Nx5vcAJRF6gzrUEEocheknjm5378mhoW
1KL8BTYcP4Q79QVUkL72W5BmJ92iYNygqa
*Archived*
1FsMGWFrpQa8sDWaJfS4isy5JWaVsbnfJT
*Shared* - a lot
***
When some want to try to deposit to 1C5LqLaDJRFf2jRpMKh9ErZgpjDB2DK7Z1
the money are automatically sweep out from 1C5LqLaDJRFf2jRpMKh9ErZgpjDB2DK7Z1 to 1J2tddvD6hiw4Tm32C6DbmsQcxNsCxEjUm .
The same with other addresses.
I think you should remove them from the demowallet.
(or allow users to create (and save) other wallet addresses).