probably understood that Facebook is monitoring viral URLs and any spammy viral URL will get caught, therefore, the prankster decided to generate URL patterns instead of URLs and as of now, it seems that the technique has worked for him/her. Note: If this post appears on your wall, don’t panic and just delete it, this is just a clickjacking/like-jacking, the prankster won’t get your account credentials/any other information from your account. For a related Facebook attack that does go after credentials via a phishing page, see Preliminary analysis of Facebook clickjacking - aprilfoolsprank, and for a self-propagating Facebook worm, see Analysis of Facebook Rotating Images worm.