Harmless wrote:It wouldn't be entirely convenient for me personally since I sometimes accidentally right click.
That's what the undo button is for.

I don't know how commonplace it is for people to accidentally right click. I personally never really experience this issue unless I'm using my laptop's trackpad (which I avoid doing for LL since the gameplay would be a disaster). But it can always be made into a toggle if some people are against it. I have used level designers where deletion is mapped to right clicking, and for me they always save a considerable amount of time by making deleting so fast and simple (and it always made sense to me logically).
Edit: An alternative solution could be that left clicking could be used for deleting
as long as the right mouse button is held down.