Today BlogTO publishes a picture (the original is difficult to find because they do not link to the original, violating Flickr's terms of service) of people wearing sneakers with the caption "Sneakers are for sneaking!". This is likely a direct reference to the episode in which Abe Simpson catches the Springfield Cat Burgler and tells his family how he caught the culprit:

Abe: He was right under my nose the whole time. He lives in my retirement home. His name is Malloy.
Lisa: Wow! How'd you track him down, Grampa?
Abe: Good question! On one of my frequent trips to the ground, I noticed Malloy wore sneakers...for sneaking. My next clue came yesterday at the museum. We felt slighted by your age-bashing, and started home. Malloy said, "I'll catch up with you."
[Malloy shoots a rope over the building]
I couldn't quite put my finger on it. There was something strange about the way he walked -- much more vertical than usual. And finally, Malloy, unlike most retired people, has the world's largest cubic zirconia on his coffee table.

Hat tip to Karen.