In your examples the host damimage is used which in some point in the past have been a deceptive site or served malware. As for Chrome specifically, they may be enforcing https (encrypted) on any served content which may have broken said image host. It is also showing up an ad blocker detector warning which to me implies the webmaster has some very deceptive ads running.
Anyway, the host is not on the approved image host
list and cannot be used (anymore).
--
If you want to inspect what triggers the warning: open your Chrome beta, hit F12 (developer console), open the ViperGirls page with the thumbnails which do not load and check the network tab in the developer console or the console tab itself.