Facebook's ongoing record is one of introducing opt-out products that harm user privacy. This is just a matter of preference. Nobody is hurt by SPYW, and it's far easier to disable than many of facebook's updates.

The issue with Facebook's changes to privacy was not that they are opt-out, but that they were opt-out and significantly impacted user privacy. Opt-out services on their own may be annoying, but they aren't a cause for alarm unless it hurts the user.