You guys have got it all wrong. Anything after wallet/ is an identifi identifier alias. So in your wallet settings, you could set up an alias, maybe like "Monnt" (blockchain.info/wallet/Monnt, and it will automatically convert Monnt into my wallet identifier. There is no blockchain.info escrow service.
LOL! Really you thing someone's alias can be "escrow"?
Besides why will he waste his time broadcasting potential null transactions?
I believe someone (solo pool maybe) is trying to validate those transactions itself in order to solve a block.
Or maybe something else is happening there!