This is a particularly aggressive form of Sealioning.
Sealioning is the name given to a specific, pervasive form of aggressive and willfully intentional cluelessness, that masquerades as a sincere desire to understand.
A Sealion is someone who, when confronted with a fact that they don’t care to acknowledge, say, the persistence of systemic racism in America, will ask endlessly for “proof” and insist that it is the other person’s job to stop everything they are doing and address the issue to their satisfaction.
The purpose of Sealioning is never to actually learn or become more informed. The purpose is to interrogate. Much like actual interrogators, Sealions bombard their target with question after question, digging and digging until the target either says something stupid or is so pissed off that they react in the extreme. The other major reason why people hate Sealioning is because responding to it is a complete waste of time.
It’s an insidious trap. Responding to questions asked reasonably is, of course, a natural thing for people to do. I like to do it myself; educating others is generally pretty entertaining, especially if they are receptive to learning. Dismissing those questions can appear condescending or rude, especially if you actually are condescending or rude.
Of course, these questions are not asked because the person asking them genuinely wants to know the answer. If they did, they would do their own digging based on your statements, and only ask for obscure or difficult-to-discover information. This is the “debate principle”. It is best explained thusly: When you go to a debate, you educate yourself on the topics at hand, and only request evidence when a claim is either quite outlandish or unflinchingly obscure.
No, these questions are asked to make a responder waste their time. It works, too; I’ve responded to Sealions before, answering all their questions and claims for evidence, only to be greeted by even more willful ignorance. It’s a way to force people into responding to questions phrased neutrally but asked in bad faith.
The name “Sealioning” comes from a most splendid webcomic, “Wondermark”, by David Malki.
It can be found here: http://knowyourmeme.com/photos/873260-sea-lioning
Sealions are just “asking nicely” but they are asking questions that have been asked and answered fully many times, and are unwilling to so much as open a new tab to look up the answer, nor will they recognize the validity of your sources, your experience or expertise no matter what you do. It is impossible to satisfy a Sealion.
Sealioning is a specific form of harassment. You may not explain their inquiry has already been address. You may not cite a source. You may not refer to a previous answer. You definitely may not ever point them to a link. You must spend all your time and energy responding as much as you can to every little details of every innocent, polite little question they ask. Sealioning isn’t a sincere attempt at anything. It’s a calculated technique to grind an opponent down.