WO'N asks: do you think it is appropriate to write it that way?

Certainly if you want to write what you speak. Writing serves a whole range of purposes. I think those who equate writing with formal and speaking with informal are guilty of inability to see that different circumstances demand different responses. Certainly speech making and debating are formal and while the former may be written at some stage in its development, it is not necessary. Notes to oneself and brief memos, although written, are informal. I would contend that posting in AWAD is mostly informal although one may be formal if one so desires.

So put dat in yer fadder's mustache an smoke it!