Basic etiquette

I find the new 'trend' of addressing clients by their full first names 1) Very rude, disrespectful as well as unprofessional 2) It shows just how unfamil**** you are with me - if you don't know how I'm addressed, how can you justify to address me on a first name basis? 3) Doesn't the POPI Act secure personal information? By using my full names, you just gave away personal information to anyone (including ID *****sters) reading/intercepting the email.