Venture Beat did a piece on a company looking to clean up a lot of the noise and impoliteness on the net. Wehn you read the whole article you will see that the service is a bit pricey for a small to medium sized site at $2,000 to $3,000 a month
From the article:
Silicon Valley based venture-backed company that specializes in removing
spam, has launched a new tool that that scans tens of millions of
comments across the web. It spots highly offensive dirty words, and
automatically removes them.
According to the company’s chief executive, Mark Risher, a tool like
this is the first of its kind as algorithms have not traditionally been
able to handle “internet speak” (coooooool, skilz, pr0n, and so on).
It took several months and the brainpower of leading data scientists
to develop the technology. Spammers have evolved to become more
sophisticated. “These are people that are actively trying to avoid
getting caught,” said Risher in a phone interview with VentureBeat.
“Trolls and hackers and social spammers are changing their techniques to avoid detection,” he said.
As Facebook and Twitter reach their ascendancy, it has become more
imperative that we find a way to remove spam. Recent data from security
company Barracuda Labs sheds light on the extent of the problem. The
study found that one in four Facebook users have received a virus or
malware, often something posted to their public wall.
It’s a more profound problem for small businesses — the appearance of hate speech on their site is a reputation killer.