Have some common sense, people. Know when to use PNG.

Personal guidelines:

• Very tedious to load on Danbooru.
• The filesize in kilobytes is significantly greater than any of the dimensions of the image in pixels. (Usually more than twice the number.)
• May have to include some inefficiently compressed JPEGs like post #240727. Perhaps a name change is in order?
• Tagged huge filesize.

• Doesn't include vector trace. (post #255575)
• Doesn't include game cg saved as PNG. (post #264236)
• Doesn't include anything animated.
• Usually doesn't include "small" images saved as PNG (post #261181)
• Generally doesn't include pictures under 1 megabyte.