Recently, I got into an argument with a large political figure online; we were arguing about the existence of “white privilege”. I’m not going to name this person.
He/she has attended 2 Ivy League colleges and one other elite non-Ivy college. I have done research and I have found that this person is still very well connected with all three of these schools and is a big donor. He/she also has powerful friends at (more or less) every single T-20.
Is it possible that this political figure can contact certain schools and tell them to black-list me?
Did the person threaten or hint at trying to do such a thing?
Since you mentioned “Ivy” and “T-20”, it’s safe to presume that you weren’t debating with Jerry Falwell Jr., or trying to get into Liberty University. So I wouldn’t really worry about it. 
Disclaimer: Admissions officers do sometimes look at a student’s social media. As long as you aren’t being threatening, inappropriate, or espousing views so offensive that the average prudent person would be scandalized and sickened, then you’re pretty much okay.
Not really, unless you consider “I don’t think you know who you’re talking to” a hint
I definitely wouldn’t worry about it then. “Powerful people” who have the ability to make admissions decisions would likely not be debating with you online, and most probably would practice more decorum and humility if they did indulge.
You’re a HS kid, to them you don’t mean much. If someone did disagree with you, it wasn’t the powerful person, but one of their many “online brand” managers/staffers. There’s a high turn over so by the time you apply they’ll probably be in another job and it’s highly unlikely they’d care enough anyway.
However colleges do check social media for insulting, threatening, or sickening posts, so if that’s what it was, stop it.
If you feel strongly about something, join a group or movement and go door to door. Call your representatives. Participate in a local or state campaign. Join the debate club or MUN.
Remember: no one’s ever been convinced to totally change their point of view thanks to social media; an individual’s opinions online don’t change anything.
Helping others is more likely to make a difference than arguing online.
Why would they do that if you’re committed to Penn State? Closing thread.