I've reached the conclusion that 95% of what Q posts is meant for "them" and not us.
So, lets say you and four friends went on a weekend fishing trip. While basking in the sun, a young 15 year old shows up in your camp lost and confused. Instead of helping her, you and three of your friends rape her for a day, then kill her and throw her in the lake. You finish the trip and life returns to the daily grind.
Five years later, you get an email from an unknown person which reads:
Used your rod like a master flyer, too bad the waters were bloody red. 4/5. Times up.
Would you know what that post meant? Of course you would. Would anybody else, other than 4 people, know what that meant? Nope.
Q is speaking to "them" through us and his cryptic drops. We can decode much, but imo, the purpose is to let "them" know what Q knows and then watch them try to cover.