Those sites are low quality and it's often easy to get much better free data. SF recorder's publicly posted property records, searchable by name, for example. T

Those sites are low quality and it's often easy to get much better free data. SF recorder's publicly posted property records, searchable by name, for example. There are also numerous private databases with high quality data which certainly don't want to be indexed. Your info being on those public sites (which isn't very meaningful due to how many errors they have) is mostly a symptom of how easily available it is, rather than a source to be plugged. Suppressing it may make it slightly harder for an uncommitted nutcase to track you down, but won't make much of a difference overall. Going from a name to much more info is very easy in the general case, and if it isn't, there won't be valid info on those sites.