Hide text within a cms textfield

Could you add a simple ‘hide text’ option (<–xxx–>) to the text field toolbar in the cms. Rather than editors having to delete whole paragraphs they may wish to keep for a future purpose.

If this is possible already let me know, i’ve overlooked it.

I incorporate a lot of switches in cms’s at the moment, but for certain things this is a bit OTT.

Thanks
Paul