It will tear a net but either tear through or be lifted when the net is hauled. Seiners and trawlers are used to constantly repairing nets in between shots, it'

It will tear a net but either tear through or be lifted when the net is hauled. Seiners and trawlers are used to constantly repairing nets in between shots, it's not a huge deal. OTOH snagging on a boulder is very disruptive to fishing and is quite dangerous, can result in wholesale loss of the gear and threaten the vessel. That will actually cause fishers to think twice.