Turning the other thread on its head and pointing the finger on yourself, what's the scummiest thing you've ever done? Something you're not proud of now and feel embarrassment or shame about now.
Me?
Stole a £50 note from a friends father's wallet when I was about 11.
Shoplifted a few bars of chocolate on occasion from local cornershop when 12-13.
Had sex with a friend of my girlfriends when I was 17, in a bar after closing
Took ecstasy several times in my early 20s, ashamed of my life walking home coming down afterwards.
I'm 36 now, matured a long time, no scummy actions in a decade at least, but regret those things above.