You know you play Factorio too much when...

[Coolthulhu]

You keep a truckload of coal, iron, copper and rocks on your person, just in case.
Your reaction to ecologists is stocking up on ammo.
You walk much slower in the nighttime.
You buy furniture in Ikea and put it together properly on the first attempt. Without instructions. While running.

[Dakkanor]

you think the great wall of china is would be better with laser turrets

[RawCode]

when you can understand that murderer is bulter only after reading book 150th time.
when you have 10 keyboards to type faster.
when you have 10 teapots with only some water in order to heat water faster when needed.
when you limit your breazing in order to reduce pollution.
when you try to heal wounds with raw fish.
when you filled your entire appartaments with cardboard placeholders.

[jakobeng1303]

you try to find your power armor
you crash into oil pipelines

[cyk0]

when it's 6 am and u remember sitting on the computer yesterday at 3pm...

[Coolthulhu]

When you see burning gas above stove and it blows your mind.
When you try to transport 10 train wagons inside a car.
When you get frustrated that 10 train wagons don't fit inside a car, so you carry them on your back.
When you turn pumps sideways to block the flow of water.

[DrGravitas]

When you reach for the grenades when you need a path through the forest.

[Lee_newsum]

When you reach for the grenades when you need a path through the forest.

When you reach for the Combat shotgun when you need a path through the forest

[capcharlisimo]

You don't know how to make a recipe, so you build a research lab in your backyard and dump food coloring into it.

[tecxx]

....when it's again 02.00 in the night and you're still not satisfied with the belt layout. damn!!!!

[DaveMcW]

When you are shopping and see a shelf of cables, you move them all to the electronics section.

[ghosrath]

You wait around in your livingroom for the robots to bring your sandwich

[Mangledpork]

When, in order to cut down a tree, you must first cut down the tree immediately south of it.

[The Colonist]

When i switch to solar to avoid biter attacks.

[Chuxx]

... you put the in the oven.

[darkminaz]

.. you try to stick a tree in your car and wonder why it doesn't run

[Explosion]

...when you attempt to set up a logistics network to automate mining coal to move it to your home

[COHL7500]

I know when i´ve played too much when this happens:
Begins to sing Pokemon theme song.
When you´ve just got all researches for being able to use train and fly and of course get the transport pack.
When you´re in school and immediately are too lazy to move because there´s just no machines to do it for you.
When you suddenly feel like, that you want to be a electrician.
When you begin to buy DOS GAMES, or suddenly want to play games with a 8-Bit Style.
When you forgot at the morning to eat and instead just go straight to the computer.
When you´ve maked 2 cars for two things in-game: Factory Car, Exploring Car.
When you´re totally alone, you slowly begin researching for every kind of armor/gun research, for getting action.
When you´re researching guns and forget that it isn´t Call Of Duty Ghosts: Alien Extinction you´re playing.
When you´ve made everything not running seperate, but running in a flow.

[boro]

... you put your fingers on WASD whenever you sit down at your computer (this is actually happening to me )
... you train your dogs to follow you in a cone when you go for a walk
... you shoot at trees from your car window to make sure you don't bump into them

[Overbyte]

.. when you press 'E' to close a web browser window..