Guys do it as well, disappear when you mention actually meeting them. I find it extremely rude and frustrating. I am doing things very wrong on these sites and not sure what I am doing wrong.
I have only gone on four coffee dates and everyone one was a bust. The first two I chatted with them for weeks. The first guy after 5 minutes I couldn't run fast enough out the door. He didn't know I was a widow and you just ruin the date when you say "wish my x-wife was dead". Second guy actually wasn't that bad but he said I wasn't ready to date. Maybe he was right.
Last two I thought meeting in person early was the way to go. Both of them just mindless chattered away. I don't think either of them asked me a thing.
I think there is one TED webinars I watched and they guy went on about how he took the time and gained a person's trust before meeting them.
I still have no idea which is the better way to go. Good luck to you.