I think you're referring to

https://en.wikipedia.org/wiki/Hypercorrection

while thaumasiotes is referring to

https://en.wikipedia.org/wiki/Phonotactics

There are examples in the hypercorrection article about people adding an /h-/ in a very similar situation, so what you describe clearly can happen. But are you sure that the R example falls into that category?

It seems to be a distinction about how conscious the change is, or at what layer of language it happens. Isn't that an empirical question that could be tested?

Strictly speaking, the masses adopting rhotic pronunciation was, originally, an effort at mimicking a privileged-class affectation. The extra "R" in "drawRing" did not mimic anything, though, but seemed required by the imperfectly deduced rule. Those in actual contact with the privileged class had plenty of examples to, er*, draw upon, denied to those without.

Class markers in speech are always a moving target, a sort of low-grade arms race: low stakes for the upper class, high stakes for lower.

So, pronouncing it "drawRing" is a lower-class marker, similar in a way to "aks" for "ask" in American English.

As always, all of these pronunciations are legitimate and produce no misunderstanding.

[*] "er" is pronounced "uh" or "eh", rhotically.

> As always, all of these pronunciations are legitimate and produce no misunderstanding.

I'm sorry but pretty much everyone who grew up with English as a second language would like to disagree.

Hearing "drawRing" to this day throws me off -- I have to repeat the noise to myself internally to make sure I understood it right.

> I'm sorry but pretty much everyone who grew up with English as a second language would like to disagree.

Not to put too fine a point on it, but their opinion doesn't count.

Foreign speakers have no say in what's legitimate and may be confused by absolutely anything.

If you wish to argue that, I'd suggest you guard your absolute clauses a bit more carefully, as they now suddenly aren't absolute. You said "produce no misunderstanding", I demonstrated that they do.

There are now many, many more foreign speakers of English than native. They definitely have had and are having an effect, collectively, on how the language evolves.