I'm going to guess it means "Lincoln Christian College", which is situated in Lincoln Illinois.
I base that guess on the report that the A$$ HAT said his professor told him to write "LCC" on the wall. Refer here.
Hey, it's plausible.
Given the prevalence of global warming hysteria on US campuses, including Art departments from coast to coast (Northwestern is nearby Evanston), LCC could signify a well-worn buzzphrase in the Global Warming racket known as Land Cover Change.
To a GW nut, or indeed to any run-of-the-mill environmental wacko dabbling in "art", The Alamo could be symbolic of anthropogenic defacement of the environment, since the whole mission complex & later the town which grew around it was founded by those eeeevil anti-Gaia priests at the site of the headwaters of the SA river, permanantly scarring the erstwhile pristine state of Mother Earth's sacred mantle.
Defacing the "defacement" with grafitti could be an act of delivering artistic retribution in the failure-warped mind of a a 44-year old loser who's still in school - an 'artist' who couldn't make it in the private market on his own & whose lackluster career must still be propped up by the taxpayers through one of those notoriously god-awful municipal art programs run by bureaucrats of questionable taste.
Having served some time in a couple of university art departments myself, and having witnessed their debasement at the hands of the PC/Green/Socialist agenda up close, I regret to say that this ridiculous scenario is, alas, entirely probable.