A few more links to Verisign's wildcard A record. However, the extremely critical monopoly status of Verisign as the operator of a TLD (and the associated registry) is not addressed here. But the peripheral areas are also not without problems - such as the aforementioned issue that users can no longer decide for themselves how they want to respond to such problems.
Apart from the fact that this procedure doesn't help against typosquatters anyway: they can continue to register their typo domains and will of course be preferentially served (a wildcard A record only applies if no explicit A record is available).
At Wortfeld you'll find the original article.