[R. Scott]

The college suggested it might simply be nonsense scribbling.

Sounds plausible. Old times (before spray paint) tagging?

[S0122017]

I did hear somewhere (in a movie..) about ancient egyptians
making up symbols to use as personal identification.

So maybe a few of the symbols are real, and the last weird one is a tag. But it sure doesnt look creative enough to be a tag.