mywot.com é seguro?

This site is only as good as the majority of its users. The biggest problem is the lack of comments about bad sites, so if your issue is not represented, please make a comment about a bad site. Without comments, I ignore bad ratings. An example is that I went to a recommended site and found it rated as very poor, but there were no comments. I am glad that I ignored the rating as I got what I needed without any problems. Another example is that I checked WOT for a site that was rated very poor and there were lots of negative comment. I changed my mind and went elsewhere. I hope these examples help.

OK technically safe, and indeed a good idea. There are some flies in the ointment in the shape of empowered users who can follow their own agenda and vote down or up sites on the basis of opinion rather than technical safety or reliability. By and large most sites you would expect to be OK are marked that way - and the converse. However its not perfect, its not even democracy.