We already get messages from space in the forms of crop circles. And decoding them has been very interesting.
And, about resources, why would any advanced civilization come here for resources? There is already a great big planet that has been broken up into bite sized chunks just passed the orbit of mars. Why would they come here? Tons of every element is sitting out there.
And if there is actually dark matter... then why would they even bother with a dinky solar system?
Further, what is happening on earth is not a safe space for alien visitors. Many people talk about meeting aliens in dreams and meditation. And, these aliens are very careful/cautious because the backlash can very powerful and unpredictable.
Hacking into the internet is much the same.
RE: Could aliens hack us?