> Your information will show up on those sites sometimes - it'll pop back up after being removed.
That suggests that they're not actually tracking down the sources, just poking the downstream sites that get data from those sources. Much less useful.
The sources include government agencies at the state, local, county, and federal level. Those agencies are not going to hide public documents with your name and address on them just because you ask them to.
There's a legal process to, for example, expunge a criminal record. On the other hand, most counties aren't going to seal the records associated with your house or other property you've bought just because you would like them to.
> Your information will show up on those sites sometimes - it'll pop back up after being removed.
That suggests that they're not actually tracking down the sources, just poking the downstream sites that get data from those sources. Much less useful.