#1, that's misinformation, they won't find any "trace of their program" because they use the exact same client.
#2 If you're that paranoid about it, copy the entire directory elsewhere and use that.
#3 I suggest WoWscape from personal experience, WoWgasm is garbage.
Wowscape has multiple realms with differing rates. Wowscape, Wowlegion, and Wowcrack.
Wowscape wrote:Level Max: 70
Drop rates
Rate.Drop.Items = 40x
Rate.Drop.Money = 40x
XP rates
Rate.XP.Kill = 60x
Rate.XP.Quest = 60x
Rate.XP.Explore = 60x
Wowcrack wrote:Level Max: 70
Drop rates
Rate.Drop.Items = 8x
Rate.Drop.Money = 8x
XP rates
Rate.XP.Kill = 10x
Rate.XP.Quest = 10x
Rate.XP.Explore = 10x
Wowlegion wrote:Level Max: 70
Drop rates
Rate.Drop.Items = 2x
Rate.Drop.Money = 2x
XP rates
Rate.XP.Kill = 3x
Rate.XP.Quest = 3x
Rate.XP.Explore = 3x
From personal experiences, stay off of Wowscape if you want to avoid complete fucking morons of epic scale. Use it to test out a character build you want to make before using it on a slower server such as Legion or Crack.
Wowcrack is where I hung out for fun, some decent guilds and players along with your usual WoWmoron.