The right to left override can also be used to bypass automod, see this:
no right to left override Unicode:
with the right to left override (notice the grammar check? autocorrect is thinking of a different word!
What is happening here: the watched word is shown as f*ck which will be flagged by the moderators. However, if you put a Right to Left override before it, you need to type in reverse, meaning you have to type this instead: kc*f
The watched words filter will not recognize words correctly thanks to the override.