Here is Microsoft's official statement on the issue:
We can certainly understand how people would respond with some shock to this apparent issue. We did too when it first came up nine years ago and we investigated it thoroughly in partnership with the Anti-Defamation League. The conclusion was that the sequence in the Wingdings character set is coincidental and that there was no malicious intent. In fact, it impacted several software companies at the time and continues to do so. Unfortunately, there was not an easy way to fix the problem. We understand that this requires explanation.
At the simplest level, wingdings and webdings are much like an alphabet of characters and provide thousands of potential combinations from which a person could choose. Changing the character set would create an impact of unknown scale on existing data and code using the affected font. Again, using the example of the alphabet, what would happen to existing documents and applications if we switched around a handful of letters? The likely result is that we would create significant issues for people, cause some unintended humorous moments and several offensive ones. For that reason Wingdings has been left unaltered since its inception.
