I am struggling to understand this at the moment. I looked at the Ancestry terms and conditions, and they state that by using their website you agree "Not to resell the Services or to resell, reproduce or publish any content or information found on the Services". Does the definition of publish not include uploading to a public forum like WikiTree? If not, how does "any information" not cover literally everything one finds out there (including the sentence from the terms and conditions just quoted, but I doubt they'll sue me for that)? FamilySearch has a similar clause in theirs but it at least mentions the possibility of getting their permission. Copyright isn't a problem with most of the documents I'd like to use information from, like English censuses, because the copyright owner (the government) has issued guidance saying it can be used in this way; but these kind of terms and conditions do seem to be.