I am on another forum that will remain nameless, but over there watermarks are viewed as not the desirable on photo's.
They or some say they spoil a photo. They could be right if it is a real big bugger right in the middle of a photo.

My opinion on them is why should we not watermark our photo's.
Yes I know if someone wanted to take one of my shots the watermark placement would make it easy in most cases to remove.
I try to place mine in the bottoms corners and out of the way.
Really I see nothing wrong with them and from what I have seen here none are detracting from the image either.

Then I was thinking why are these people complaining about painters who sign each and every paining they do.
There may be a slight difference for these to forms of art, but why is is okay for a painter and not for us photographers?
So I leave you with that. For me I like to put my image up and will continue to do so.
After all its mine and not the fella from around the corner.