Here is the verdict on each.
1) http://www.dhmo.org/
completely bogus! Nothing on the site is an outright lie. They just don't disclose the fact that dihydrogen monoxide is another name for water.
2) http://www.cis.org/
admits their bias In their logo that do say that the want lower levels of immigration.
3) http://www.thedogisland.com/
completely bogus! There is no such place. But you don't have to tell your dog that.