As all the ww-address transactions take place on Whirlwind and are not associated with the Bitcoin network, the question then arises how safe or secure is the database is that contains all the details of the addresses and transactions. Is it encrypted at REST?
If someone wants to send coins to ww2xmfzikTonuQc3iw7Xezvd9qwHibxryRj, then they do so via the pay to note feature on Whirlwind. These coins will only show up on Whirlwind and will not show up on the bitcoin network.
It is not possible to use Electrum (or any other bitcoin wallet) as you have tried to do to sends coins to an address which begins with "ww", as such a transaction will be invalid.