After a while, you learn to as quickly as possible "encourage" these types of patients, that the practice philosophy that you use likely won't be in agreement with what they're looking for in a dentist, and that you as the dentist wouldn't feel comfortable in adopting some of the treatment philosophies that they think are correct since you (as the dentist) would be forced to compromise what you feel is the standard of care and respectfully don't want to incur any potential liability risk by practicing below what you feel appropriate......
For some patients like that, taking that stance with them will essentially guarantee that they'll never be walking through your front door again (not a bad thing IMHO for my sanity 😉 ) and for others it might cause them to pause for a minute and think about the info they read online verses what you, as a trained professional that they're able to have a face to face conversation with, is saying, and sometimes those types of patients can, and do, become "great" patients for you!