Yes it is safe as can be to post links, uploading pics requires that you remove metadata and even then it isn't suggested but should be fairly safe particularly it is safe if you did not take the picture yourself. The person who wrote that article does not understand quantum computing, although it is true that it can pwn many forms of modern encryption if it ever gets advanced enough anyway. There are already quantum immune public key algorithms though, so it is hardly the end of privacy PERIOD...just the end of discrete logarithm and prime factorization based public key encryption.