>I have been reading up on politics or engaged in political discussion online for maybe ~4 hours daily for the past two years.
The exact opposite of not being politically engaged and having the few times you've seen the term be in a positive usage...
I've been actively against SJW's and every niche they try to get their grimy paws on for the past four to five years. Almost all of my political engagement has been contrary to SJW talking points - not because of what they argue for, but because of how they go about it.
I use it negatively and have no issue with saying I do. I'm around crowds that exclusively only use it negatively. I also see it used positively, or at least tongue-in-cheek all the time. If someone uses the term and claims they did not mean to use it with negative connotations - I believe their intentions.
I'm not pretending it is common. I'm declaring it can be, is used, was used, and has been used positively and neutrally and that people still do so. Prior to #GamerGate turning it into a slur the Wikipedia article even mentions it was a positive thing. It's very easy to not be actively aware of #GamerGate or TiA (TumblrInAction) and outside of those two bubbles you're not very likely to even run into the term "SJW".
sickbeard denies the intent and claims to have viewed it in a neutral, if even slightly positive, light. Arguing otherwise is dishonest and viewing things from your own viewpoint. Projecting intention where there is none. Ironically that is something people are sick of SJW's doing. And yes, I used it negatively there.