Procedural security is, unfortunately a different matter.
Most students come from a home environment where they were not the person responsible for security and are unused to taking a personal role in securing the residence. Additionally, most students are also unused to any group living arrangement, and are not cognizant that their actions affect not only their personal security, but the security of all those other students who reside in their housing unit. Every time an un-thinking peer props open an outside or a corridor door, YOUR security is affected. When your roommate, or suitemate, leaves the room or suite door open, YOUR security is compromised. Accept that in a suite, you have three or more roommates instead of one or more, and work with all of them to achieve mutually acceptable security .