Personally I think that showeq is a great tool, so long as it is not abused. I've noticed many people that are using it to find all the rare mobs and kill them as soon as they spawn for the loot. These people should be banned from everquest, as they are having a major effect on other players and the game and are actually cheating at the game. I use showeq mostly for the maps to keep from getting lost is some dungeons while being chased by tons of mobs, or to avoid those lvl 60+ mobs that just love to wonder around an open zone. But using the maps can also be considered cheating, and I believe it is too, but it does not have any effect on other players.
Just my thoughts about some ShowEq users.