Wow, what a bunch of losers... really kids. You all state the obvious
(you can't protect images, they're cached, yadda, yadda, yadda). There
really was a simply question here, can I disable the right-click in
Konqueror... there is no need for me to explain my reasons to you. If
you have nothing to add simply sit down and STFU.
And we don't have to answer your questions. This is a discussion and news
group, not a free helpdesk; some of the regulars here do feel inclined to
answer questions, in their own free time, but the particular question you
asked is one of the most-asked questions in the group and the answer is
almost invariably "don't do that" for a number of very good reasons.
If you disable the context menu, all you're accomplishing is annoying the
end user. There's more on that menu than just "save as" -- a number of
people use their browsers' context menus to navigate, bookmark, and
perform sundry other browsing tasks. If you're selling something, you
don't want to annoy the end user (id est, your potential customers) if you
can avoid it, and you can definitely avoid it in this case.
Watermark your images. Post a paragraph reminding people about what is
and is not copyright infringement. Realize that there is no technical way
to prevent people from saving and using your images, as you present them,
if they are so inclined.