Depends on the bolt and the rock, and the fact that the bolts might take repeated 20 foot whippers... that will put some stress on the bolt and or rock over time, and can have some cummulative effect. All situations aren't equal. Draws are fine in some cases, but in others the bolts are back from an edge, and I'll use a sliding x with limiter knots to keep the rope from sliding over the edge. Besides, this discussion isn't just about bolts, it is about the sliding x... my point is that I don't find limiter knots to be a big hassle.