It doesn't matter at all. Don't be embarassed. Anyone who reads your original comment will know exactly what you meant.
Some of the smartest people I know frequently mis-grammar a sentence every now and then. Sometimes even frequently.
A language is a tool for conveying ideas. If a given paragraph conveys the same mental result for each reader, then it doesn't matter if any given word is wrong; the tool has done its task. I wish more people would realize this and stop condemning frivolous mistakes...
Yes, it is about time to allow some wiggle room. I am glad that grammar and spelling correction became a meme. At one point, it looked like the web was going to deteriorate into all lol speak. It was also leaking into offline writing, as well. Ebb and flow has a great end result, but the process is often painful and/or annoying.
Case in point: I'm pretty sure that using "mis-grammar" as a verb (or at all) is not the officially approved way of saying what you wanted to say, but it got the point across just fine.
EDIT: As an aside I think it reminded me too much of the concept of precedence in maths, so the brain-burp was probably sourced from there.