Yes. It's easy to convince yourself that you did something, when in reality what you did was worse than doing nothing. You actually made yourself think that you tried to make a change, and as a result if nothing happens, you have a "well, at least I tried" excuse.
Which is why this is the reality:
http://www.princeton.edu/~mgil...
If you don't know what that is - that's the study of democratic impact of things like "desires of the masses" on actual legislative process. The study that concluded that US is de facto oligarchy, because when masses want something and capital wants something else, capital almost always gets what it wants.
And if you want to know why that is, all you need is to look in the mirror. "Just write your [legislative representative] (so he/she can ask for a bit more money in donations when he/she makes the opposite decision as to have a bit more to finance his/her re-election campaign)" is the solution that is worse than doing nothing.
At least doing nothing makes you feel guilty about it, and may eventually push you to act in ways that may actually bring about a change. What you are advocating is status quo. As a result, you're part of the problem.
And while "sawing people's heads off on youtube" is also a terrible solution, yours isn't that much better.