If you're storing information on the internet (aka buzzword "Cloud"), you're at higher risk of getting that data stolen or spied on. This isn't new. It is something to be aware of the more you store online.
Really?
The only thing that might be easier is for Google or the Government (via subpoena or collaboration) to get access to my data.
It is easier and it's a real concern.
Encrypt your disk and be smart in your choice of software: small fries are denied, and even the government is annoyed.
if your disk is encrypted, the plug should not be disconnected.