I would argue though that the torque example is a particularly problematic symbol conflict as any equations involving torque are by definition going to include many, many references to the circle constant. Yes there are other symbol conflicts in math, but usually they are separated by logical fields (you generally are not doing using e when dealing with the charge of an electron constant (except in the case that you are dealing with magnitude of the electric field as a function of distance) and even when you are, it is hardly a problem because you never use the natural logarithmic constant except as a power function).

I think the appropriate change here though would be to change the symbol for torque to say, 'q' or something. Probably not going to happen, but wouldn't be as much of an issue.