From what I know about legislators (I am a longtime SF resident but I am also a DC native and have known some congressional staff over the years), it is pretty rare that informed constituents write to them in a cogent and authentic voice about specific legislation, and they do pay attention to this.

Calls may work even more.

It won't work all the time and how much they do will depend on the issue and why they are supporting it etc. But it's worth a shot.

Remember I said: they should know you're paying attention. This can cause them to also pay attention.

Alright, you won me over. I emailed my congressman from the EFF website with my own message. That's the best I can do right now. I just feel like politics is a losing battle. If its taken over by special interests and there doesn't seem like there is any end in sight, as it gets easier and easier for them to sway the people that are actually suppose to be working for us. What is the point? When we are combating legislation that no sane person should have to deal with there comes a time where the whole thing is unlawful and it we should stop investing our power into it.