If you feel you can do so, then by all means do so. Just make sure you are teaching what the Church teaches.
There are so people who spread some pretty terrific vitriol on the Church, or even religion in general.
These people that focus their posts on how every opponent of “gay marriage” is a bigot, hateful, hate-mongering. How every person who opposes something like Masturbation is oppressed, oblivious to the truth and so on.
At one forum I read, the members-only section often engages in this discussion. I’m at the point now where I won’t be renewing my paid membership to the site, next time it expires. I don’t want to or need to see that sort of hateful rubbish.
Its only right to want to stand up to this, and defend your belief. Like I said, if you’re comfortable copping flack and bad words, as well as criticism for being “an oppressed closet case” (as seems to be popular when the topic of a homily on Homosexuality comes up), then by all means do it!
Otherwise, don’t put yourself into a situation where you can’t defend yourself, OR will be hurt by what is written.