methods users might try that either block the trackers' ability to collect data in the first place
When we do opt outs we try to send the bare minimum amount of info.. But the data brokers and people search sites go out of their way to require ridiculous things such as faxes of photo IDs. We automate the process, though believe me we don't like having to ask our users for this info. We also go to extra measures to use encryption wherever possible. For example we literally can't view the photo IDs of our users even if we wanted to.
Disc space -- the final frontier!