Dangers of DNS Redirection and Wildcarding
The ICANN Board has prohibited, for all new gTLDs, a practice referred to as “redirection” – however, some ccTLD registries still use this practice. Instead of typing in a domain name and getting “not found” you are redirected to an IP address chosen by the registry – normally to a search page as opposed to a webpage. You could go to a pay-per-click page that may contain mailware. Suppressing errors changes the way DNS protocol works. Pinging would no longer tell you if a webpage is responding. Imagine your email being redirected. There are many other applications that could suffer from this practice. More here [PDF].