[Frosty]

Originally Posted by Baby Lee

It developed over time

It started with calling out reposted material by replying 'Repost.'

Then people started 'highlighting' reposts, by posting REPOST at the rate of one letter per post.

R
E
P
etc.

Then when people got wise to the game, they would try to thwart it with random letters

R
E
P
- M
- D
O
- R
S
T

Then Q was settled on as the default REPOST interrupting letter.

Then then entire thing was distilled down to Q meaning someone noticed a repost.

Kind of. It started here and is Pablo's fault.