- These people for starters. Myself, for another. Slash as a guitarist has been monstrously influential, and most rock guitarists have learned riffs from Appetite (Sweet Child of Mine in particular). Slash was also influential in sparking a renewed interest in "classic rock' guitars like the Stratocaster and Gibson Les Paul into style again. At that point, most metal/hard rock guitarists were playing Flying Vs and newer models of guitars.
There are over a dozen friends in local bands I know who used Appetite to learn to play guitar, bass, drums, whatever. One friend of mine said "In 1988 when Appetite came out, I bought my first drum set and practiced 4 hours a day to that album for months on end until I knew it top to bottom, and in the process, learned how to play drums."
Also, Poison started before GNR.
Also, dude, this is the Hall of FAME
. GNR are really, really famous. I don't think there exists an Active Rock station in the US or Canada that doesn't play them. Surely they have as much right to be in the HOF as Tina Turner.