I'd think its more likely these are dumb teen boys, the same ones that swat people. Still would be creepy to get that kind of stuff on your twitter out of the blue. I think that lady is married with a child, so I doubt she's got too much time to set up a hoax. I've heard stranger things though.
I lean towards believing these women as everyone that's ever created something has received death threats. I was dating a psychology major who had a anonymous survey over smoking. There were a few rape and death threats in the "other comments" section. I'm still not sure why as the people filling it out hadn't a clue who or what was reading the responses. It's odd that there is a formula now for this harassment.
Step 1. Be a woman and poke at the gamer/comic community by stating that there's something wrong with the way that communities' product relates to women.
Step 2. Claim a internet group (Never heard of 8chan before today, or wizardchan until reading about Quinn) is posting threats with home info.
Step 3. Make sure everyone on the internet knows this is happening.
Step 4. The battles between everyone continues with both sides claiming victim.
At the end of it all, I can't help but feel bad for the women.. if they did get the threats, that's some fucked up shit. No one should ever feel unsafe because of an opinion.. we're not some fucked up third world. If they faked it I feel bad as they're that low they're grasping at whatever they can to get attention..