It is up to them but most of the time it is against the rules to

That is obvious detain abuse, don't use detain to clip people into areas they can't get out of, you should bring a second thought before doing it.

1: I remember a mod telling me that teaming is now allowed but I might be wrong

2: You are detain abusing, you detained a E&T in the vault, making the only way to get out is going into the menu. You are not allowed to do this.