How do you get letter badges?

[Moderated]

I just got F but I thought they were from a poll or something.

 

[DoPo]

I just got F but I thought they were from a poll or something.

Well, maybe you should have studied harder if you wanted to pass.

But seriously, the F is from last Halloween - watching Halloween videos gave you the letters F, R, E, A, and K (in that order, yes) and some others gave you horror props, like hockey mask and the like.