people get rejected in ultra harsh ways, sometimes being filmed and then posted on social media for trying to ask someone out.

Are you sure this isn't exaggerating it a little? This may be anecdotal but I have never dealt with any such harsh rejection within my social circles (neither have my associates). What I'm trying to get at is that there may be a vocal minority that gets a lot of online attention.

Then again if thousands upon thousands of people see such a post (like on say r/Tinder) and take it as a common phenomenon it would still have the same effect.