While I wouldn't drop him yet, I don't know if I would use him this week. But this all depends on your roster. Since you're in a 10 teamer, you might be able to find some help until he comes around. I find it hard to believe he's going to have a really long stretch of bad games like the last 2.
Smith has had some clunkers but has usually been good for around 50-60 yards or so. I don't think he's ever had a stretch like this. I'd give it a couple more weeks if you have room on your roster.
I'm confused by his usage. They are hardly even using Flacco's specialty (throw it up and get a pass interference).. best deep ball in the league, so good the wr has to run back to it and make contact and get a flag.. sorry rival rant.