I have been reviewing the birth certificates for individuals who were born in 1940-1943. These people are probably still alive. Isn't this a privacy issue?
Different countries have different laws, but in general a 100 year rule applies. Indexes to vital records are often exempt- e.g. in the UK lists of births with the district of birth and mother's maiden name are public well beyond 1920, but you cannot order those certificates.
If you're sure that these records should not be online, once you've finished using them it may be a good idea to send a message to FS Support with more specific details, so that they can remove them before someone sues them.
Would you please clarify your remark, "..you cannot order those certificates". It implies one cannot order post-1920 birth certificates from the GRO or local register offices (for England & Wales).
I was mistaken, see: https://www.gro.gov.uk/gro/content/certificates/faq.asp