The same magical creature that compels you take undertake this quest, would also compel Tom Cruise to hunt you down at all costs for 10 years.
Scientology is notorious for being excellent at stalking people.https://en.wikipedia.org/wiki/Fair_Game_(Scientology)
Social media can contain what ip you logged in from, which will link to your internet service provider, which will link to you. maybe log in from proxy ip, IDK (just guessing. I'm not a professional people-tracker / avoider of people-trackers.)
but if Tom Cruise has compelled Scientology to find somebody, you're going to have to cover your tracks the best you can.