I personally am not bothered by the larger font size. I would rather deal with that than something really inappropriate like asking about different drugs that are not for OSA treatment as has happened before or fighting or slamming other forum members, etc., and it was easier to read than the smaller print.
More importantly, I think that we should focus on helping the OP and not focus on the font size, IMHO. If there is a violation or a concern from a poster, I am sure those that moderate the forum will discreetly discuss it with the poster.
That being said, I will think about the question and see if I can think of anything to suggest other than what has already been suggested.
Have a great weekend all.