So, the captchas used on this site are super simple. They work because the questions are domain-specific knowledge. I had used reCaptcha and got consistent spam signups, but none with this method. People seem to be overthinking them, or I phrased them poorly, but either way a list of answers won't hurt anything.

Most of the captchas are fill-in-the-blanks, so you enter the part that isn't given. All answers are lowercase. Example:
Q: "Perfect ?????" (there are five ?'s)
A: "clear"

Here are the answers to the current set of captchas:
Hard drop
T-spin
Number of lines cleared in a Tetris: 4
Perfect clear
4-wide combo
Standard Tetris field is 10 units wide
40 lines (sprint)
Tetris the grand Master
Tetris pieces are made of 4 "minos" (squares)
JIZLOTs
JIZLOtS
JIZLoTS
JIZlOTS
JIzLOTS
JiZLOTS
jIZLOTS