Some characters don't openly converse, and you can't force that on someone. I agree more people should start including people in their RP if they're clearly trying to start RP or are new, but you can't try and force that onto people, because some characters just aren't like that for various reasons (incredibly shy, busy with other stuff, just a dick char IC) - of course you can still RP with them, but you can't just say "ok everyone has to rp with people now".
I used one of my characters as an experiment to see who'd be willing to roleplay with somebody who's received severe brain trauma and a collapse of mentality near to the point of being considered retarded and to see who'd roleplay with me. The majority of outlanders (whom having changed my OOC name had no idea who I was) had no problem ignoring me whether they just didn't react or they IC'ly walked off and it went to the point where one of them tried killing my character just because he could with questionable IC motivations and more or less p2w'd his way through the whole thing which dallas can confirm on my behalf. It's a little different when I play a vortigaunt because suddenly everybody wants me to use "that green magic" to make their car run forever. From my point of view the regular playerbase is elitist in their nature because they don't want to RP with an average joe who just joined the server.