The atmosphere at Etown is pretty lenient. Generally, if students don't act too stupid, then campus security will leave them alone. Underage drinking is the biggest problem, which mostly occurs during the weekends. Security will patrol and monitor particular party spots during the weekend a little more closely than during the rest of the week. The policy is that students 21 years of age or older may have a six-pack of beer, one liter of wine, one four-pack of wine coolers, or one pint of a distilled alcohol per of-age resident in the housing unit. The school is usually OK if students have more than this, as long as no underage students are present. If students are caught or accused of violations, they do have the right to appeal before an academic board. After the first violation, "points" get awarded to the student, which means that they're on probation. As long as the student doesn't violate any more policies, then the points don't affect their college life.
RAs are generally very tolerant. Just don't make a lot of noise real late at night during the week. Academics are a huge thing and nobody likes to be kept up real late. A lot of the issues that RAs have to deal with are noise violations and the occasional roommate spat.
In regard to attendance of classes, policies depend on the professor. If they provide an attendance policy, stick with it. If a professor feels the need to outline how many absences a student can have, then they will follow that number and drop grades significantly if the rule is broken. If students skip enough classes, they will get reported to the College, which can lead to things like counseling or extracurricular sanctions. Just don't break the professor's policy and things will be fine.