This is a handy thing to remember:
Shall I let you in on something, my #EndAusterityNow friends? Twitter isn't the same as public opinion at large. pic.twitter.com/k1o1p6iact
— Daniel Hannan (@DanHannanMEP) June 20, 2015
We over/underestimate the difference between online opinion and public opinion at our peril. Not that this will stop anybody from doing that, of course. Probably not even me.