I think you can voice your opinion and still be welcomed. With the large number of people on here varied subjects are bound to come up. Hence, that may be one of the reasons for the huge growth.
The basic premise of quilting is still the main subject. As with any main subject whether in person conversation or on a message board other variables (subjects) will be introduced.
I personally enjoy the thought of coming to this wonderful forum to gain knowledge of different subjects without having to cruise all over the inernet.
Especially early in the morning with my cup of coffee and still wearing my pajamas!!