** happens all the time in medical research **

Clinician : So here's the data, can you make something beautiful out of it so we can publish?

Statistician : Sure, let me take a look. So here you coded 1 for "dead" and 0 for "alive". What's the 10 for?

Clinician : Oh, didn't notice. Dunno.

Statistician : So they're missing values. No problem, just wanted to know.

Clinician : What? No way, let's consider them as 1

Statistician : "Let's consider"? And publish in influent reviews with fake data?

Clinician : Yup