This is the best solution available for the purpose.

The button is fully configurable. If your site is very deep (with long contents), you can configure the button to only appear when you want.

I asked in the suport forum for the possibility to use the button in the left side of the webpage. In less than 24hours, a new version was released, with that possibility. Who can ask better than that? Thanks!

It took me less than a minute to download, install and publish. I wanted a plugin to block right click without any kind of message. This one does it, and does it very well in my image's module and in my (content) gallery. Of course you can use the right click disable message if you want.

You can´t protect your images 100%, there is always some way around, but this way you prevent a very large number of people from steal it.

This is an interesting 1.5 native comment extension, that everyone should give a try before going to other comercial options.

As a user who spent several minutes analysing which comment extension to use, I believe that this extension could be much more sucessful if it had a demo link, right here in this joomla directory page. It's difficult to find a demo, so users just use another option and not yvcomment.
(you can find links for sites that use this extension somewhere in the documentation page).

The documentation looks unactrative, but it does the job and it is very complete.
It should be created a website for this extension and support. (The support is done in a single topic, in Joomla.org forum).

However, I couldn´t get any support. The author was in the support topic, saw my messages and helped other persons, but just ignored me. Didn't say that my problem was too basic to help, or that was too complicated and he couldn´t help, it just ignored me.

And when that happens, and if you aren't a joomla expert, like I am not, you should think twice if this is an extension you would want to use.