Overall, it appears to do a fairly good job, though, spammers are fairly persistent and have been known to adjust their tactics quickly, so, even if you setup a feed and widget with TidyTweet, you’ll want to keep an eye on it to see what new words you might need to add to your filters.
Also, I’d like to see a language filter added to the tool, as well as an option to filter out @replies. While it’s great that Twitter is growing internationally, displaying tweets in Spanish, French, or German isn’t necessarily useful if most of your readers only speak English or vice versa. Likewise, for a topic like "Bruno," where you're hoping mostly to see microreviews of the movie, @replies between users discussing the film adds a lot of noise that would best be filtered out.
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