Modern-Day Scarlet Letters

The story line in Nathaniel Hawthorne's The Scarlet Letter is very familiar: Hester Prynne is exposed as an adulterer and is forced to wear a scarlet letter for adultery; not a volleyball, basketball, or track letter from a school that begins with an A! Nowadays, we don't do that; instead, famous adulterous scamps get written about in People or the tabloids. Or the New York Times, sometimes.

But society doth change; morals evolve, and people change in different selections from the Sin of the Month Club. As a matter of fact, there's a whole passel of scarlet letters out there for people who feel the slightest amount of guilt or tall poppies needing leveling. Here's a few for your edification:

B - Isn't wearing a bra. 
C - Eats cupcakes.
D - Dances (for Baptists).
DD - Well endowed.
G - Does not eat gluten-free foods.
H - Drives a Hummer.
M - Puts mayonnaise on barbecue.
PC - Did not use politically correct terminology.
R - Put recyclables in the garbage can.
S - Three Stooges fan.
V - Did not vote.
W - Cited Wikipedia in a reference.

Can you add some others? We need some serious grass roots reformation to get people on the Straight and Narrow again.