I've been thinking about this for a while, but this question reminded me.
After the incident of Pilegesh Begiv'ah, the tribe of Binyamin had been almost wiped out and was down to 600 men. Everyone had sworn not to marry off their daughters to them, but now they regretted their oath because they didn't want the tribe to be permanently destroyed. They came up with a way to get wives for them without violating the oath - first they destroyed Yaveish Gil'ad, who had disobeyed the community, and left 400 girls alive. Then they asked the other 200 men to kidnap their wives from Shilo.
From the Shilo story, it appears that the oath only applied to the parents, not the girls. So instead of the complicated plan, why didn't they just let their daughters marry whomever they wanted, without their parents' involvement?