"But they're targeting all students,"

Where do you read that? While that is certainly implied in the article (and by Biscuitjam's commentary), there's no evidence presented to support it (edit: or either way for that matter). There's information stating that the students were why the ordinances were passed, but not that they're being unfairly targeted. There's no information about the number of citations issued to students vs. non-students.

The ordinance covers three unrelated people living together, not two, so a roommate is fine, just not three unrleated people.

I don't see anything here which is alarming at all, just enforcement of statutes that passed the local government.

-Zeke