The first plant off the parent plant is generally the strongest and they get weaker as they get more distant. Yes, they will continue - bit like pumpkins. When we farmed the beasts, we went out every day cutting off runners to stop them taking over, but towards the end of the season, kept the first runners for replanting. If you want them to root where they are, just cut off number 2,3,4 and 5 and peg number 1 down. That will enable it to put down roots and develop a good crown. Then in Autumn cut it free from the parent by just snipping between them like an umbilicus. You can lift the new runner and plant elsewhere once they have sound roots. Every third year, we took up the parent plant and burned it. The trick is to be a bit selective - good strong runners that have grown in your own ground are generally stronger, healthier and adapted to your eco-climate. By the way after nearly killing with work and stress, I didn't grow any strawberries from 1988 to this year because I was just strawberried out - but I don;t think they've changed habit!