It's possible that the probe considered the various starships and space stations along it's path hostile and neutralised them as a defensive precaution. But it's also possible that it didn't mean to effect Earth, the way it did. The vaporisation of the oceans and power drainage, seemed like an unintended effect of transmitting the probe's message.
That would mean on one hand that it didn't mean to cause the damage it was causing, but on the other hand it couldn't stop transmitting until it recieved an answer, or the planet was "neutralised".
That would mean on one hand that it didn't mean to cause the damage it was causing, but on the other hand it couldn't stop transmitting until it recieved an answer, or the planet was "neutralised".