One of S’s friends was a recruited athlete in a big money sport, and was told by several interested coaches that they scrutinize social media and “everything else they can find” for their recruited applicants, well prior to admissions. One added “whether you think you’ve hidden it or not”. They call it the “Don’t be a bozo” speech.
The technology already exists and is in use - perhaps the infrastructure would need to be ramped up before being applied more widely to more of the applicant pool - but it would not surprise me if the economies of scale started to apply making this become a more cost effective way to help identify questionable applicants.