I'm sure that if you stopped to think you recognized this as a reflection of a current gun law controversy, because when you measure a check in time you create a very serious decision that has to be made; ie, what happens when time expires? The current controversy isn't about social media checks, it's about the 'background check' that has become pretty widely accepted.
Say I am a gun dealer, and you want to buy a gun. You willingly accept that you will have to submit to a background check, maybe grudgingly, maybe not. You come back three days later looking to pick up the tangible token of your constitutionally granted rights...and I haven't gotten any results. Now what? Maybe the agency is systemically incompetent. Maybe the results are lost in the mail. Heck, maybe the request was lost in the mail. Maybe I think you are a dangerous nut so I just 'misplaced' your information rather than even submitting it. Maybe I know you are a dangerous nut but I want to make a sale so I misplaced your information. No matter what the cause, we have a situation here where through no fault of your own your exercising of your rights is being prevented.
Common sense says that since you haven't passed the background check the law prevents me from selling you a gun. The NRA says that I should be obligated to let you have your gun, and of course in many states whatever the NRA says goes. What is the proper course? If the law says I have to give you the gun, and you take the gun and commit an atrocity, and subsequent investigation shows that with your background you should never, ever, have been allowed to buy it, there is liability, somewhere. Who "dropped the ball"? What if it isn't a specific dropping of the ball, but an outright reality that the time limit is just impractical and routinely goes unmet? What if the time limit was practical, but by adding some additional aspects to the checked 'background' we have made it impractical after it is already in use?
When we consider adding some other aspect to the "background check," as in some sort of dive into social media, we compound the existing issue. To compound it without considering how to solve it in the first place is counterproductive.