This sort of thing has always been possible ~ newspapers could have pulled it on each other simply by hiring students part time to go through their university news racks to check for otherwise obscure violations.
Today all you need to do is hire an unemployed young person to spend his time in his mother's basement matching up that which appears in the LVJ with stuff elsewhere. In some cases LVJ may well be the source. But, in other cases they won't ~ and if they don't have a release then they are a violator.
Many of the duplicated items will have been run through AP and other "wire services" but as many folks here have noticed AP, et al, are much less careful about how and what they "lift" than they were years back. Even some of the AP stuff appearing in LVJ may well be in violation of copyright.
In many cases a careful analyst would be able to track back to the original source and offer to split the profits by joining in an organized suit against LVJ ~ knowing that the judge will not be sympathetic to LVJ.
LVJ has made this bed and I suspect they can be put out of business the same way.
[and if they don’t have a release then they are a violator]
I’ve wondered this too. Every time a reporter gets a story, shouldn’t they be technically getting arelease from eveeryone they interview? Has Sharron Angle given the RJ a release for every article they’ve written about her? I’m petrified of Righthaven, not that they will win long term (it would be a cataclysm), but the amount of damage they can do short term.