We don't distinguish between uppercase and lowercase in tags. If you enter a tag called "VIDEO", if there is an existing tag called "video", then your tag will map to "video". So essentially you are forced to use the same format as the first person that created that tag.
We could force all the display to capitalized when displayed on screen, but then people won't be able to tag like "ThisIsCool". It will be displayed as "Thisiscool"
Thoughts? How can we improve this experience?