Programming a subject that you only have access to via social media is much harder than the avenue of in-person programming. However, I do not believe it to be impossible.
One must gain as much control as they can over their subject. This would mean limiting basic comforts: no hot showers, limited access to food, no blankets, pillows, etc. These things can then be "awarded" for good behavior.
Additionally, one would need to get their subject in a much more malleable condition. For this, I recommend limiting sleep. Make your subject stay up for a few days, and they'll be very vulnerable to suggestions and programming.
Lack of sleep affects the brain. It impairs function, reaction time, and more. Most importantly, it disrupts emotional regulation and causes memory problems. This is vital to programming. Your subject being unable to control their emotions and having a more limited memory will make the act of programming that much easier for you.
I will likely expand more on this subject in the future, if anyone has any questions.