In the TNG episode 'The High Ground' a group of terrorists use something called a 'Dimensional Shift' technology to perform site-to-site transports without interdiction or detection, but this technology does incurable cumulative genetic-damage to living tissue.
What do they do with it? They send Living terrorists out using the device to plant small bombs on their targets, instead of simply sending the bomb itself along without risking any of their own. If a small bomb wouldn't do the job if not planted expertly by a living saboteur, just use a Bigger Bomb.
![Very Happy :D](./images/smilies/icon_biggrin.gif)