To me, if I were to judge any work of art, I would approach it from the perspective of digging it up 5,000 years from now. Far enough in the future to effectively eliminate any culture aberrations that might result in calling pure junk "art".
Then, "Does it transcend age and time?", "Does it still strike me as a compelling piece of work?" and "Does it require explanation beyond simple appreciation?"
If it meets one or all of these criteria, it's "art". Anything less should be cremated as not to embarrass our civilization any further than our liberals and their idiocy will in the future.
Exhibit A: "Ruined Play Doh", Artist "Timmy" age 5 
Exhibit B: "Bill Mahers Mother", Artist "Unknown and likely traumatized" age Unknown
Exhibit C: "Bring your own sheets", Artist "Upgrayedd" age 27
Exhibit D: "Morning after frat party", Artist "Pete 'Chugger' Kazinsky" age 20
From the Museum of Bad Art http://www.museumofbadart.org A Great resource for collectors