You're too late. It's already accepted practice. It's fine to use "literally" in a non-literal sense, just as it is with things such as "decimate" and "unique." Sourpusses who continue to rail against these things have almost literally forgotten that language is what people speak, not what professors of English prescribe. Of course, you're not very unique in wanting to fight these lost battles, but don't worry, we're just going with the flow, not setting out to decimate the language.