I have been a Ba'al Kri'ah (Torah reader) for the past approx. 30 years. I try to be diligent about both word pronunciation and proper trope. There are several places where accenting the wrong syllable on the word changes its meaning (e.g - Ve na TAT ti = I gave vs. Ve na ta TI = I shall give). Likewise, there are numerous places where the worng trope can change the meaning of the verse.
Most gab'im know to correct the Torah reader when the word is incorrectly pronounced, except for the accenting shift as mentioned above. Few, if any, know to correct incorrect trope that changes the verse meaning.
Aren't there minimal requirements for being a gabbai for Torah reading? Is there an effective way to train people to become competent Gabba'im for performing this important job?