Many people fear what they do not understand -- and most people do not understand the internet. The internet is still a relatively new concept, and its still evolving.
The thing is, most all genealogical research is done via public records. Some companies provide access to public records for a fee, while other companies provide access to the same records for free. Not all public records are available on the internet, but an increasing amount is.
Now, in order to access this info, one usually has to provide information about themselves in return. Mostly, this is to assist with marketing and advertisers.
Many people create pseudonyms in a effort to not only thwart being targeted by marketers, but also as stop-gap to identity theft (a growing concern in our internet world)
The irony is that we're not nearly as anonymous as we'd like to think we are.
In the world of genealogy, everyone is a child of someone, and that someone has a relative who already knows who you are -- not to mention all the public records of you that are readily available to most anyone.
And on the internet, your own computer betrays you by creating a fingerprint of your IP address, your computer type, and your browsing habits. In the world of digital marketing, you can be personally targeted -- without even knowing your name.
If you want to be anonymous -- stay off the internet. Never sign anything. Only use cash.
Anonymity does not free one from responsibility. It only temporarily delays the inevitable.
There is nothing wrong with trying to maintain some level of privacy, but understand, that it can never be completely secure.