runtime watermark

Hello!

Does anyone know a viable way of creating a watermark over the panorama images at runtime? I mean one that would be at least moderately safe. Adding a simple plugin/layer doesn't work since it can be easily removed by anyone with a little programming knowledge. Some way perhaps to add text directly on top of the image, using the webgl api maybe? Sorry I'm not really proficient in it.

Thanks in advance!

I want to protect the image, but preferably without hard-burning the watermark on the source, also it'd be great if I could use a dynamically generated (variable) text as the watermark. The layer is a problem because whoever has just basic knowledge of developer tools for example (no need to be a hardcore hacker), can rather easily find and remove the layer. This is something you couldn't do in flash, but sadly in HTML it's an issue...