Yes it's frowned upon, but there is another guy who does it all the time, and once I commented on it and I got downvoted to oblivion for that, so shrug.
It is frowned on to do it for publicity, or because you need eyeballs. If you genuinely wrote something very interesting that you think should be shared it seems reasonable to do so. But I'm basically paraphrasing the rules at this point.
The guy I mentioned seems to do it to attract views to his blog. It's on an interesting topic and is not icky/commercial and people who read it through here seem to like it, so ok, whatever. It's stuff you can already read about in books though.