As sft has pointed out, I do not correct most spelling mistakes, as we all make those easily enough; most of the errors I correct fall into two categories - the use of Americanisms instead of British English (ie color instead of colour - one a county abandons its language then it abandons its culture) and the misuse of the apostrophe, which is a highly valuable grammatical tool with a specific purpose, but a tool which few answerbank visitors (they would doubtless say visitor's) seem to know how to use. That said, I do sometimes correct words that are so badly spelt (I believe the word of yours I corrected was 'interergating') that a correction will help the writer to avoid embarrassing themselves in future. After all, if you spelt interrogate as interergate in, say, a job application, it could easily have an adverse effect on your chances of success. Like it or not, employers like to see good spelling. Good spelling and grammar also help people to express their questions more clearly and make themselves better understood; bad spelling and grammar can make questions ambiguous. Finally, I would add that the AB editors often correct spelling, presumably for these very reasons - I have yet to see anyone have a go at them for so doing.