Originally Posted by dadoorsron
Yes, Pruning these plants would be the right way to go about it 10 years ago. However, at the size they are at now, all you can do is pull them out. Plant a nice hedge that is easily maintained with yearly pruning or use a growth regulator like Paclobutrazol to limit the amount of pruning you need to do for 1-2 seasons.
The arborvitaes in question are NOT hedges... look again...