When was the last time you applied for a job with a company that has a modern HR department? Any HR/recruiting outfit worth a **** in this day and age will comb through a candidate’s social media history before extending an offer, or even granting an interview. I’ve had excellent candidates for some very good jobs lose out on opportunities because of dumb things they posted on social media.
Who knows what the OP and the linked tweets are referring to. However, kids these days need to understand that social media posts don’t just simply go away or have no lasting consequences.