There were plenty of risks involved with boarding ships.
This was especially the case when everyone aboard them was hostile towards the visitors and wanted to do everything they could to prevent their vessels from falling into other people's hands!
In human combat, boarding actions were precarious when there was no guarantee that the losers would receive proper treatment.
If it became clear that the occupants would die anyway, then there was always a chance that an engineer would rig a power reactor to blow.
Even without this final measure, there were plenty of other ways to frustrate intruders. Many military ships contained to so many anti-boarding measures that it was practically suicide for any unwelcome guests to step inside.
This was because it was too common for corridors and compartments to turn into killboxes at the press of a button!
