Suiciding is obviously not a viable option.
That being said, ofcourse people are going to get cut off with how fucking huge the lines were. On EU when an officer or single dude gets cut off the other line lets them return to their line most of the time, in my experience at least. You won't have any scenarios where the whole line is chasing after the one officer.
For the people saying that Irish and Rafael weren't going towards their own line: when you get cut off, it is often easier to run around the back of the enemy line to get back to the other side. A 30 man line charging after you obviously makes it impossible to run around them. The LG can just spread out and surround you, giving you no possible way back to your line and driving you to the map edge.