If these services are evaluating the string in the text field such that it results in the value Null rather than the string "Null" it is concerning. The usibili

If these services are evaluating the string in the text field such that it results in the value Null rather than the string "Null" it is concerning. The usibility my be compromised for users with these surnames but I wonder if the security is also compromised via code injection through these fields.