I have to admit, at least in the spectrum of US liberal/conservative bias, it seems easier to share characteristically liberal views online. I'm typically progressive in my politics, but not in all areas. Most often, I part from liberal politics when it concerns the use of negative regulation to bring about desired results. IMO the best policies are not guided by 'what is right', but by what encourages that which is closest to 'what is right'.
Occasionally online liberal echo chambers spring up where the conversation revolves around identification of injustice rather than pragmatic moves to improve upon the current situation. That's one thing I have to credit conservatives with. Even though they often might appear more self-serving when compared to liberals, they do seem (IMHO) to put more weight upon what can or cannot be done.
It is a noble ideal to be sure. But, it can also be a trap. Sometimes the things that you might think can't be done are extremely valuable. Personally, I would have never thought Wikipedia possible. Healthy skepticism is awesome. But a priori bias in problem-solving can be crippling. However, both 'sides' are guilty of that.