A few months ago I agreed to drag some folks up hood west crater and all but one decided they were comfortable without being roped up. The one gal who did want to rope up wasn't wearing gaitors and this contributed to two falls. The way up was fine, but I think she was too fatigued on the way down and was getting sloppy with stepping carefully and hooked her pant leg with her crampon. I was in back and saw her do it. I immediately said "SHIT" and hit the snow, she came tight on me shortly therafter(there was probably 5-10 ft of slack in the rope; I know, a bit much) and pulled me down the hill a few feet but due to good packed snow/rime the arrest held firm enough. The second fall she affested before she came tight on me.
Moral #1: wear gaitors, they do more than keep snow out of your boots.
Moral #2: if someone is going to fall, let it be the 100 lb person of the group; they are easier to catch.