LOL more coins possibly lost due to website wallet. Maybe its there, look harder. Maybe you goofed.
BTC is more and more like FIAT with every coin put in another entity's control..
Yeah sure, they cant see your BTC or clean out your wallet if so enclined.
i assume you just try to troll around, but what the OP did -- in comparison with the bitcoind satoshi client -- is to create a new address, but never letting save the wallet.dat file on the harddisk (compare this to a hard reset of your computer) and also not making a backup of it. so, it's unfortunately not really the websites problem. (it might additionally hide, grey out or strike through the generated public key to make it more obvious that it isn't synced yet, but that's only a small UI modification. nothing more fundamental is possible to do)