Please don't complain about punctuation, spelling or grammatical errors.
Ignore them or quietly fix them to reflect your understanding
of what was written if they bother you.
Your statement about whether or not to complain is something that allows
differences in opinion, but "quietly fixing" things is /never/
acceptable. This is a very presumptuous thing to do, since it associates
your (perhaps incorrect) interpretation to something that was said by
someone else.
Now you have been show to alter quotes, which can at best be explained
as an unfortunate attempt to 'quietly fix' things. Giving you the
benefit of the doubt, assuming that you did so without dishonest intent,
I would strongly urge you to refrain from doing this in the future; in
intellectual discourse, it is imperative that the integrity of citations
can be relied upon. At the very least you should provide a clear
indication that you are paraphrasing, if you elect to do so. These are
just basic prerequisites for having a descent discussion. I would hope
that if you think about this for a bit you will agree.
Best regards,
Sidney