It is a good site as other users have submitted. Probably the ones marking it as malicious are the spammers themselves.
Too bad WOT is so easy to hack and there is no trustworthy review of the comments.
This website is basically a database of phone numbers made by users.
It's extremely useful in order to check a given number, and to find out which company is calling (marketing, sales, phishing, collectors and so on).
The users can also comment.
Useful site. Rates telephone numbers, in terms of trustworthyness vs annoyingness. Almost like a WOT for phone numbers instead of domains. Useful for preemptively blocking telemarketers and scammers.