I never watermark my photographs. If people are on my site looking at my work, then they’ll have probably noticed my name on the site. I don’t mind them being used and those that have, have attributed my name to them. I don’t really worry about it.
I think if I were a wedding photographer or studio portrait photographer and my photographs were my business, my bread and butter, I’d probably do it then, but only to publicize and promote myself.
But I’m not, so never will.