Why subject limited?

If discussion of a certain topic results in one sided and disproportionate unpleasantness, driving out certain folk, this is likely to affect a wide range of subjects, since one can usually infer that if someone is intolerant of belief X, he is intolerant of beliefs Y and Z. Intolerance usually reflects a belief system which is apt to have an official line on just about everything.

Since mentioning the most obvious and important example of such a belief system is apt to have adverse consequences, I will mention a substantially less important and less menacing example of such a belief system, that of the Ayn Rand institute.