have a co-worker that will eat half of everything and leave the other half just chilling in the frig.

I'm talking about open coke cans, open danishes he purchased from the store, half-eaten pizza slices, half-eaten pieces of cake. Once I opened up the cabinets to get some condiments and his half open honey bun fell out.

His reasoning for this behavior was if he brings the entire item back to his desk he will eat it all and he doesn't want to

Same guy also has a bad sinus problem and I cannot keep up with the number of times he will blow his nose at his desk, get up and go straight to the frig/kitchen and touch shit.

I was about to ask him to step outside one day and sqaure up