Watched Words - Is there a way to block the use of asterisks with certain words instead of it being used as a wildcard?

[Moin]

@Discourse

Additional Information

You can test Regex expressions on https://regex101.com/ . If you do so, ensure you switch the regex flavour to ECMAScript.

I think it works there, so I would expect it to work in Discourse too. I am curious as to why this is not the case.