wgerrard
Veteran
Sharing my work without watermarks leaves me open or vulnerable and I refuse to accept the risk.
Realistically, the purpose of a watermark has never been to prevent theft, but to allow the owner to prove that ownership. So, a small unobtrusive watermark on the edge of a photo works as well as a large mark that obscures the central area of a photo. In fact, many paper products have watermarks that are invisible in normal use.
There is no way to prevent duplication of images posted on the web. The fact that an image is displayed in someone's browser means it has already been downloaded to his machine. That's how this stuff works.
Post low-res images (pretty much a requirement here, anyway) and don't worry about it.