A social norm against unjustified opinions?

A cur­rently ex­ist­ing so­cial norm ba­si­cally says that ev­ery­one has the right to an opinion on any­thing, no mat­ter how lit­tle they hap­pen to know about the sub­ject.

But what if we had a so­cial norm say­ing that by de­fault, peo­ple do not have the right to an opinion on any­thing? To earn such a right, they ought to have fa­mil­iarized them­selves on the topic. The fa­mil­iariza­tion wouldn’t nec­es­sar­ily have to be any­thing very deep, but on the topic of e.g. con­tro­ver­sial poli­ti­cal is­sues, they’d have to have read at least a few books’ worth of ma­te­rial dis­cussing the ques­tion (preferrably ma­te­rial from both sides of the poli­ti­cal fence). In sci­en­tific ques­tions where one needed more ad­vanced knowl­edge, you ought to at least have stud­ied the field some­what. Ex­ten­sive per­sonal ex­pe­rience on a sub­ject would also be a way to be­come qual­ified, even if you hadn’t stud­ied the is­sue aca­dem­i­cally.

The pur­pose of this would be to en­force epistemic hy­giene. Con­ver­sa­tions on things such as pub­lic policy are fre­quently over­whelmed by loud dec­la­ra­tions of opinion from peo­ple who, quite hon­estly, don’t know any­thing on the sub­ject they have a strong opinion on. If we had in place a so­cial norm de­mand­ing an ad­e­quate amount of back­ground knowl­edge on the topic be­fore any­one voiced an opinion they ex­pected to be taken se­ri­ously, the sig­nal/​noise ra­tio might be some­what im­proved. This kind of a so­cial norm does seem to already be some­what in place in many sci­en­tific com­mu­ni­ties, but it’d do good to spread it to the gen­eral pub­lic.

At the same time, there are sev­eral caveats. As I am my­self a strong ad­vo­cate on free­dom of speech, I find it im­por­tant to note that this must re­main a *so­cial* norm, not a gov­ern­ment-ad­vo­cated one or any­thing that is in any way cod­ified into law. Also, the stan­dards must not be set *too* high—even am­a­teurs should be able to en­gage in the con­ver­sa­tion, pro­vided that they know at least the ba­sics. Like­wise, one must be care­ful that the prin­ci­ple isn’t abused, with “you don’t have a right to have an opinion on this” be­ing a generic ar­gu­ment used to dis­miss any op­pos­ing claims.