Members retain copyright over anything they post on this forum, and also grant an unlimited and irrevocable licence to Phoenix Rising over that content. For more clarification on that, see the Terms and Conditions in
Forum Rules Explained.
This means that content that members have posted here cannot be taken by somebody else and reproduced elsewhere
for commercial gain. However, as I understand it (and I am not a lawyer), where the content has not been made available commercially by the poster, there would be nothing illegal in taking that content and quoting it elsewhere with comment - indeed, even if it were information that had been commercially exploited, it would be quite legal and indeed normal to do this provided that it is only an extract of any article that is quoted, and it is attributed. That is exactly what we all do with quotes from articles in newspapers etc: that is copyright information but extracts from it can be legally reproduced elsewhere.
In the case of reproducing comments from a private conversation (email or letter, for example) it would be generally considered really quite rude to reproduce that content anywhere (even privately) without asking the permission of the person who sent the private correspondence. However I think (but I am not sure) that this would not be illegal (there may be some circumstances where it would be).
But as for quoting posts from one forum on another forum, maybe I'm missing something, but I don't really see anything unusual or untoward in that. One could link to the original post - this is a public thread on the internet, after all - and what would be wrong with that? If one quotes that "Ecoclimber said this on forum x", well, it was said on a public forum and I wouldn't have expected that to be a particular problem. It would be a different matter if it was an article or blog post that was reproduced in full somewhere else; in a case like that it would be morally and perhaps even legally necessary to ask for permission. But I wouldn't expect that quoting somebody else's public forum posts here somewhere else, without permission, should be a major problem. I doubt that Wally saw it as a rude thing to do, and I wouldn't see it that way either, really.
Of course, if one were also bad-mouthing the person somewhere else, and criticising the comments there, while engaging in a quite different way on the original forum, then that would be quite rude. If Eco's complaint is about the actual comments that Wally made about him or his posts somewhere else, then that's different. But then, in that case, Eco might quote here what Wally said on the other forum, in the same way, and I would personally think that to be quite reasonable to do also. Though of course, if the comments elsewhere breached this forum's rules, that would be a problem.
So perhaps I'm missing something here, and Eco or someone who agrees with him on this issue can tell me why it's rude to quote elsewhere what somebody writes on this public forum. I don't get it - and I am sure I've been quoted elsewhere by now, and that doesn't bother me, I expect it, I know I'm posting publicly. The only time it did hurt and felt rude and a betrayal was when it was a private communication that was posted publicly, and that's where I personally think the line is on this question. Quotes from what we post here publicly can be posted elsewhere, both legally and morally, within the confines of copyright law; that's how I see it, am I missing something here?