images can be indexed and ripped outside your site. you might need atleast a watermark
Evolution user, I like the back-end speed and simplicity

True that!.
There are viewers, the mere browsing folk, and then there are grabbers, those people who use all sorts of browser extensions to sniff and get what they want (whether they know source code or not), and then of course there are the web developers.
Viewers have no business with your images.
Any person who right-clicks on an image already is gathering momentum to steal that image.
I for one, know very well how I have been severely provoked by someone who locked out my right-clicking ability.
I went the farthest length to rip that content, and I did it with glee.
Disabling right-click should only be done for UI effect/functionality, not security.
TinymceWrapper: Complete back/frontend content solution.
Harden your MODX site by
passwording your three main folders:
core, manager, connectors and renaming your
assets (thank me later!)
5 ways to sniff / hack your own sites; even with renamed/hidden folders, burst them all up, to see how secure you are not.