Anime Cons are a great place to meet anime fans, go to workshop, panels, and get autograohs but there are also the place where the evil of evil live bootleggers O.O!!!!!!!! As a fan you should proctect yourself from these evil leeches who want you money and uses your fandom to get to it. This is a guide to help you spot the fakes.
Bootleg DVD
Region Coding - If the Dvd is Region 0 or All Regions (also known as Region free) then be extremely careful as very small percentage (less than 1%) of legitimate dvds have no region coding.
Chinese Writting - this is a dead giveaway and is the number 1 way to spot a bootleg.
Title of Listing - almost all the listings with the heading 'ENG DUB' are selling a bootleg from Hong Kong.
Price - Look at the price, if the seller is selling 26 episode boxset at $10-20 for a 26 episode series then it's most likely a bootleg as these prices are too good to be true
Packaging - If the anime comes in an fold out style case then it's a bootleg. No official US dvds use this style of packaging.
If you choose to buy bootlegs because its cheaper please check out theses sites for cheap legal anime dvds
DvdPacific.com and DeepDiscountDvd.com
Hope this helps and remember only you can protect yourself from Bootleggers.