You know what... I teach ESL and sometimes make similar errors. I bet lots of native Dutch speakers do the same thing in their language too. As long as something is comprehensible, I don't see a big deal. Yes, I do point out and correct common errors to students (when they are at the level where such correction is necessary) but it doesn't "grind my gears" when native speakers do it. I just don't think it's a big deal in the long-run.
I see threads like this occasionally - you know what? Sometimes people who get annoyed about these errors make other errors themselves. They don't notice it or realize it. Nobody's perfect.
Funny enough, there is actually no such thing as "correct" English. In French, you have L'academie francaise (a governing body on the "correct" French language) but an equivalent does not exist in English. So, while people will argue what is correct English and what is not, there is no official standard and there are a variety of "correct" English language forms in this world

For example, if someone complains about young black people slanging their words, ie. "ebonics", I could kindly point out that African-American Vernacular is now a recognized dialect with precise structure
