Text formatting: Escaping tildes or ats

I don't think this is super high priority, but it'd be nice to be able to escape the ~ or @ symbols so that something isn't automatically turned into a link to a group/user. For example, I noticed in a comment I made that ~ers gets automatically turned into a link to the non-existent 'ers' group. I think if I write \~ers then it should not be linked. (E.g. ~ers)