I personally put one asterisk when me myself replying or writing the description, but for the story I wrote, I never censor them.
It it my preference, and I won't be putting M tag for swearing, but I certainly will toggle the M tag when slur and degratory(is this the right word?) us used like f*ggot, n*gga etc, though if there's no intention of it to became a swears/degratory words my characters said, I actually will leave them be.
Example like I wrote the novel name by Agatha Christie by its real, old name, which is Ten Little Nigger (it's called And Then There's None now), I don't think it is necessary to censor it because, hey, it's the real name.
I know there's gonna be backlash but it is personal taste. As a reader I hate seeing asterisk. XD