Riot seriously needs to redefine their definition of a troll build
Every time someone is reported as trolling via build, Riot takes it as "This person is playing something not META, ban them!" (or goes off topic) when in reality most people don't care as long as they're playing a viable build. I don't want a Miss Fortune support with TP that builds full AP when we really need a locket or Crucible to keep the team alive, instead of a quick burst of 100 magic damage from her E or 200 damage from her ult. I don't want an AP Riven building lich bane because "double passive".
I don't care if that Riven goes AD/Crit, because it's viable. If that Amumu wants to go full AP, more power to you my man, because it's viable.