If you look at the forum category "The Flood", people sometimes may post bad links. So if you have a bad feeling about a link, or it takes you to something that needs to be downloaded, DON'T click the link and DON'T download what it wants you to download.
But other than that, it's a good website, personally, I go on The Flood forum all the time.
A fantastic website, one of the best, if not the best for any individual gaming franchise. I can look at all my Stats for games like Halo 3, and Halo; Reach - including heat-maps, my custom content, my online rankings and much, much more. The Forums are popular, and heavily moderated - so generally are safe for use by children. Overall, it's easy to navigate, secure, regularly updated and extremely useful for both personal stats and general news on past and upcoming games.