It's definitely a scummy thing to join a site like this just to meet women.
A pool for singles to fish in is not a stable or supportive one, because dating is not a stable or supportive activity. You wouldn't turn to OKCupid or Plenty of Fish for support for a reason, and it's because people who are looking to date aren't looking to be a listening ear, a good friend, or to show compassion to suffering strangers. They want excitement, sex, intimacy, and romance. People who turn to support sites may just need to be treated like a human being by someone who understands and meet people they can talk to.
On another website I'll occasionally get random guys message me, be excited to have someone to relate to, and then have them disappear when I refuse to give out the required personal information for them to see how much of a hottie they've hooked (pics, Facebook, etc). What that says is that despite being the target audience and needing what the site advertises, I'm not valuable as a poster because I'm not interested in strange men 2,000 miles away... on top of feeling like I'm not noticeable because I'm not an active poster, good at cheering others up, or funny. It's everything bad about real-life in the one place I can turn to at 2 a.m. on my laptop when I'm starting to feel like a worthless freak again.
They should be ashamed of themselves, and if they have any decency at all they'll leave.