Itwill it's not you it's him. When a bloke disappears there's a good chance he wasn't really interested in seeing you in the first place and was just whiling away some time at the computer.
SingleSock I find your name so heart wrenching... every time I read it I think of a lonely little sock full of holes in the drawer...
You can't take OLD personally. Imagine you're in a crowded carriage on the tube - the chances of you wanting to chat to any of the men in that carriage are pretty slim, let alone wanting to date them or have a relationship with one. OLD is kind of like that but on speed and yet it's so slow. The 'on speed' bit means that a lot of messages are sent out as "blast" messages so they are generic and short and not so sweet and far from erudite: "hi sexi how r u". Those messages should just get binned instantly. Then you have the messages where the writer has put together two vaguely coherent but generic sentences. This is the gentleman caller who doesn't want to put in any effort just in case you don't reply, which you won't, because two sentences are only vaguely better than: "hi sexi how r u". To be honest once you've deleted and ignored those messages you're probably down to half or less of your in-box.
I'd say that if you're bored after messaging someone for a day or so then I would expect that to translate into a dull date so I'd just knock that chat on the head. When you start chatting to someone you like, you'll know and you'll be anticipating their next message with a frisson of excitement.
I was chatting to a guy a few weeks ago during my utterly tedious foray onto Match and within a day I was bored rigid. He claimed to specialise in an area of my industry that I know very well. I was bantering with him about some technical aspects and it was clear from the delay in his reply (so he could google the meaning) and then the half-arsed reply that he didn't have a clue what he was talking about... I didn't disappear on him though, I just told him that I didn't think it was worth pursuing our chats as I didn't feel we would hit it off in real life and wished him well. He was quite charming about it, thanked me for being straightforward and I suspect he was relieved!
If you're doing OLD because you think you're going to find your soul mate within the week then, unless you're a very rare exception, you're setting yourself up for a fall, that will hurt when you land. If you look at OLD as a way of meeting guys to 'interview them' to see if you then want to date them then that's more like it.
For me POF and the like are basically a bunch of CVs that you have to wade through to see if someone's got the skillset you're looking for to see if they merit an interview.