"Why the boarders do not simply transport their enemies away is unknown."
Canonically, it's easier to beam something in (as long as you have an open space to target) than it is to beam something out (which requires you to lock onto a target). This might be the cause, though that's just speculation. --Bounty 09:40, 14 November 2007 (EST)
- Indeed, electronic countermeasures other than shields may make getting a transporter lock difficult. You would have a particularly difficult time transporting moving targets if you couldn't get good sensor data telling you where to find them, since a transporter lock requires the exact location of the matter to be transported. --Ted C 10:06, 14 November 2007 (EST)