Never once have I cut a line or noticed damage I could attribute to zebs. But I don't drag live bait rigs on the bottom of the lake, and we hardly have any areas where there is larger rocky structure. individual rocks will be covered, I can snap some pictures this weekend of what the shallows around our dock looks like; any golfball sized stone will have near complete zeb coverage. Our lake is sand/gravel & mud bottom. The zebs do like to attach to large coontail weeds; i'll often see them with the weeds when I foul up pulling a bottom bouncer.