So, I searched and came up with nothing.

Well, I usually leave my input jack in my guitar when I'm not playing. Will this hurt my guitar, and if it does, how can i fix this?
Don't know for sure but I highly doubt it. I leave my cable in because constantly putting it in / taking it out works the nut loose* on my guitar.

*Just me or did that sound kind of sleazy. Shouldn't be posting at 4am
Let me tell you about heartache and the loss of god
Wandering, wandering in hopeless night
Out here in the perimeter there are no stars

Out here we is stoned
If you have passives, it's fine. I actually do it. I'm ALWAYS unplugging it, then going over 10 minutes later to play it. When i'm on a good day (when I want to play all the time), I just leave my amp in standby and play it 40 minutes at a time.
Call me Wes.
Fender American Deluxe HSS Strat
Chicago Blues Box Roadhouse
Bad Cat Cougar 5
1957 Gibson GA-5
Ceriatone 18w TMB Combo
Hughes & Kettner Tube Factor
Various Ibanez TS9s
Weber MASS Attenuator
It wont do anything......what the hell in the first place made you think it would? If you have active pups it could drain your battery.
Alright, thanks. I've always wondered if it did. Now I know, so thanks.