'tis the season to be grimeful
The good thing about winter is that car/van/truck graffiti grime is very high. Damp conditions, invariably throw dirty, muck laden spray onto the vehicle and the air of joviality apparent during the festive season, often results in some transit monkey scribing a 'witty' message on the side of their (or usually someone else's) mode of transport. If one were to equate this to a mathematic equation:-

f(x) = p * (whn/20160)

Where
x = The probability of Grime graffiti on the back of a van/truck
w = Number of wet hours in the preceding 5 days
h = Number of hours vehicle is left standing stationary amongst ones work colleagues in the last 24 hours
p = Popularity Factor of driver amongst colleagues (Bemuddlement has noticed that most grime graffiti is clearly not authored by the driver as most is self derogatory). On a scale of 0..1 [based on the Watkins Scale of Popularity]
n = Copies of Tabloid newspapers read in the last 7 days by scribe

Hence the addition of the inscription of "OSSA" along side the letter "T" in "COURT" should've been predicted.