Yes, and no. Some of the tactics used by the fringe left (I don't really like the SJW term, as it's a derogatory term used to dismiss people trying to drive goodness in the world, regardless of how annoyingly they do it) are, well, annoying, to say the least...and some are self defeating, absolutely.
But I guess I'd rather live in a world where people annoyingly try to make it better, than to have no one trying to make it better at all.
If I run into an activist that is a little out there, I will examine their issue as objectively as I can, and decide whether to support them based on the issue, not their methodology. After I decide if their issue is something I can get behind, I will then look at their methodology and decide if I want to participate in their activism. If I can't participate directly with them, because I don't agree with their tack, I can still champion their goals on my own, by being a voice for the issue, without condoning or participating in their methodology.
Of course, if I am not aligned with their issue or message, I'll walk away...or if I'm here, I'll debate them.
So, ya, I guess I'm gonna pick other?
The important thing for me is not to let my annoyance or first impression prevent me from at least hearing them out.