heya 1L chica,
i had a similar experience 1L year. my section was full of gunners. these people read the cases, did the example problems, purchased the nutshells, highlighted the supplements, and took every single practice exam they could get their hands on. it was all very intimidating. the hours and hours that they put into material that was neither required nor recommended by the prof was staggering. needless to say, i did my best to ignore them (which admittedly was difficult, given that 1st sem of 1L year you really have no clue as to where you stand or as to what works on a law school exam). i read the cases and i went to lecture. i did not buy a single supplement. i only looked at the practice / old exams from the particular prof who was teaching the course. in some ways, my peers treated me as a second class citizen for my overall "lack" of effort...
..the moral of the story? i outperformed all of them in the grades dept. try not to get sucked up into the we-are-gunners-we-must-conquer-all vortex. stick to what the professor assigns / talks about in class. it is of absolutely no advantage to bring in extraneous outside information to your final exam. if anything, it probably hurts you..
(i.e. just ignore them - or, conversely, if you are the sadistic type (and you probably are, hence your presence in law schoool), mercilessly watch with pleasure as your starbucks-fueled type A classmates spends hundreds of hours digging their own graves...)