Assuming they would have similar feelings as they had with their older brothers:
- Dylan wouldn't care
- Eric would and would then convince Dylan to go NBK elsewhere, or would first warn his brother to stay away.
Then again, Byron Klebold had drug problems early and overall seems to have worked hard to earn Dylan's animosity. Eric's brotehr wasn;t like that and it seems that he cared aboutt Eric and that's why Eric respected him much more than Dylan his brother.
So maybe its not a case of differences between Eric and Dylan, maybe its just a reflection of how Kevin Harris was different from Byron Klebold.
Either way, it would depend on how much Eric and Dylan would care about their younger siblings. On one hand they were willing to risk Nate's life and the lives of other people that they hanged out with. On the other hand, perhaps they would care about their own blood more. Dunno.
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Life is like a tram - you need to know when to get off.
"Bullet Time" - a school shooting film from Poland