You guys are being very absolutist. I've maybe not done a huge amount of boating compared to some of you, but way more than the average leisure boater. I have encountered plenty of vlockies, but they've universally been helpful and I don't recognise at all the behaviour others have mentioned (apart from the one I mentioned ages ago, but I'm fairly sure he was actually a CRT chugger getting above his station rather than a vlockie - certainly haven't seen him around here again anyway).
However I suspect it also depends a lot on where you go - I've had a fairly limited range so far (and did a lot of that out of season). I do wonder whether there are specific locations which attract those who are a problem - interesting comment above about it being something suggested to people by their counsellors, maybe these are people who find social interaction difficult.
I do wonder a little about some of the attitudes on here though - for a start the first sentence there is a complete strawman, nobody on here is saying vlockies are good even if they're bad. But maybe some of you are also the opposite of an excited spaniel and ironically very similar to those you're complaining about - personally I welcome the presence of vlockies for the social interaction - it seems some here really don't want that. It's also really easy to deal with the minor stuff - yes I've been told to stay on my boat, on occasions when the vlockies were clearly going to work me as quick as I would myself I've complied, on others I've just politely said "no, I'm used to single handing, I'll get off and help if that's OK". Lack of eye contact may just signify poor social skills, but that certainly doesn't make somebody incapable of being a good vlockie, not so long as they are prepared to listen. I also note the attitude of wanting to work the locks - well maybe such people haven't done as much concentrated boating as me - after 30 locks in a day single handing I'm bored of working locks and happy for any assistance ?