Dictionary.com defines theft as:
the wrongful taking and carrying away of the personal goods
of another from his or her possession with intent to convert them to the taker’s own use.
I mention this because I want to make something clear. Taking someone’s cache and listing it as your own on another site is larceny or to use another word, theft. Geocaching.com has been around for 10 years and some other geocaching sites have been around for nearly as long. Why is it the introduction of a new geocache listing site is prompting people to suggest that theft could be a problem?
If people are going to steal geocaches or geocache listing details they are going to do it. This could be a problem until such times as there is a listing standard.
One of the really cool things about geocaching is the fact that each cache is identified by the exact latitude and longitude of its placement. Because of this it is almost trivial to check if there is another cache at that location or even close to it. Any question of cache ownership can be removed by simply checking the coordinates of a potential cache.
What we need is for ALL the listing sites to get together and work on a data interchange that prevents this from happening. From my point of view failure to coordinate efforts, regardless of how much they might not like it, is BAD for geocaching. Ultimately that is bad for anyone involved in the geocaching ecosystem, including you and me!