Social attitudes

My questions:

• How can you determine how soon / how easy it would be for the public to shift to a new attitude on a given issue?

Examples of shifting social attitudes

• Airbnb (is renting out a room / apartment really a shift in social attitudes?)
• Putting your credit card information into a website
• Kim Kardashian / Paris Hilton making sex tapes more accepted
• The black / women / LGBTQ rights movements