So, you're a fresh security officer with a charged baton and a mind to enforce THE LAW? This page provides guidelines on what to confiscate when you search someone.
The term contraband applies to items in the illegal possession of people aboard the station. Generally speaking, “illegal possession” refers to:
There are also circumstances in which an item should not be considered contraband because it is not illegally possessed:
As with all things, some common sense is required when making determinations of contraband. A plastic eating knife is a knife, but is unlikely to be considered a “dangerous item” by an average person. The delicious-looking sandwich the Head of Personnel just ordered from the kitchen should not be confiscated due to security somehow justifying that it has an “obvious combat application.” The janitor running around in a soviet army costume with a holstered banana is not actually an armed soldier, and doesn't need to be processed for “illegal” items (though uniform regulations may apply). Officers may be liable for illegal detention if they process people for contraband incorrectly.
Antagonists have access to a variety of items that are either designed to deceive people, or appear otherwise unknowable or strange. Generally speaking, these items should not be treated as contraband unless they fit one of the above guidelines. For example, a Syndicate revolver or energy sword are obvious deadly weapons and should be controlled, while a parapen looks like a regular pen to the naked eye and would probably be ignored unless special attention is called to it.
For magical or religious items, it is better to assume that they are mundane until their powers are witnessed. A wizard’s scrying orb looks like a plain old crystal ball. A cultist’s tome is just a nonsensical book to the uninitiated. Generally speaking, until the crew sees magic or powers that they can connect to those items, they should not be considered very suspicious or dangerous things on their own.
Remember that the true nature of most antagonist equipment is not common knowledge, and roleplay accordingly. The Uplink page offers a quick reference for traitor items that may appear immediately suspicious.
As a general rule, the AI and its Cyborg minions should not be actively attempting to inform the crew regarding contraband items, but only in response to a request. Additionally, some devices' functions based on their appearance should be immediately obvious. For instance, if someone attempts to show you a sleepypen to analyze it, simply state that it looks like a pen, so it must be a pen. If the individual demonstrates its purpose onto another person, and the other person you are observing falls over, you can then qualify the pen as a hypodermic dispensary, because you just witnessed that demonstration. There are several other items with similar intricacies, and likewise station synthetics which are designed more like logical computerized intelligence should follow the same logic, so as to immerse yourself in the role while also not actively trying to give people information they want to hunt antagonists.