Spotlight phones home in OS X Yosemite, version 10.10, and it is enabled by default: it can be switched off, but with Apple insisting that it now takes people's privacy seriously, the software has raised some eyebrows.
Count my eyebrows as being raised too. It should be off by default and opt-in only. The problem with these decisions is that they increase my suspicions of all activities. Apple pulling a Facebook really makes me concerned.