>> "I'm fairly concerned that Northern Ireland has high potential to become a bloody battleground."

This would be the first time that those who want Irish unity could actually sway a significant number of unionist voters. Violence would ruin that opportunity so I doubt it would happen. This vote has increased the possibility of their goals being achieved politically. If anything I would expect violence to rise on the unionist side if it did look like a border poll was going to take place and not go their way.