Once upon a time, photography was associated with the really cool sound of a motor driven film camera advancing the film. Then, digital photography came along and took that cool sound away.
Photography can still sound pretty cool in a studio environment with a bunch of studio lights all firing. Unfortunately, it's not a sound all photographers get to experience.

So what sounds are left? Well...we have the autofocus confirmation beep! Now, the beep has often been regarded as "not professional" and some photographers will cringe if they hear it.
There are also times we do need the camera to be silent but there are also many times we do not.
The beep is actually a helpful sound to inform you focus has been achieved. It really doesn't deserve to have the poor reputation it does as it can be a helpful tool.

I have decided I really like the confirmation beep sound on my Nikon D200 and it's quite cute. I'm going to turn it on and enjoy it! With our fun sounds being taken away and with mirrorless cameras looking like they will soon remove the majority of sounds from photography, I'm making the most of what is left. I am going to shoot with the autofocus confirmation beep on.

Do you beep or not beep?

I relish the quiet serenity of my sojourns into the natural world, blending in and not drawing attention to myself. This is absolutely disrupted by the focus confirmation beep either on my camera or any cameras around me. I have learned to look for focus confirmation AND focus tracking by looking at the viewfinder indicators. When possible I use my mirrorless camera with all sounds turned off. And I stay away from other amateurs that insist on using the beep.

So, to answer your question, I don't beep.