My thoughts on this matter:
GoLite is totally out of line to make such a statement. If they don't want people re-selling times, they shouldn't be having the sales in the first place. If I were the CEO of GoLite, I would have the OP in my office for a career decision session. To air such things publicly and threaten a customer is BAD business.
The volume of goods we are talking about in relation to GoLite total sales is *tiny*. We're talking about a few hundred dollars in a multi-million dollar business.
What you cannot do is to claim you are a dealer or use the company's logo, trademarks, artwork or other intellectual property. Warranties seem very gray on things like this, unless the manufacturer requires proof of purchase in the form of a receipt from the dealer. That gets harder with lifetime warrantied items. I wouldn't expect much when buying used gear or from sources like this. It's part of the deal and that is why some people pay retail. There is risk involved.
IMHO, ff ANYONE sells an item, it is the buyer's option to do anything with it he likes, unless there is a written contractual agreement restricting the use or resale, and even that is open to interpretation and litigation. Software licensing is a good example.
My concern as a subscriber and participant on this site is that John conducts himself honestly: that he ships the items in a timely manner, that the items are as represented, and that he makes a good faith effort to correct any problems that do arise. I haven't heard anything to doubt his practices.
Having an open forum where people can sell items relies on the honesty of the participants. I think the BPL subscribers have been fortunate in that regard and I hope it continues. It is possible that some items sold here are stolen goods-- I doubt that very much, but it is possible. The same problem arises on eBay and Craig's List. I have read of scams on the knife collectors forums that pale anything that has gone on here.
The Gear Swap forum does provide a great service to many people and I'm sure it allows many to purchase gear that they could not afford otherwise. It is recycling in it's best form.
As to selling on multiple forums, I see that as an issue between John and the BPL moderators. As long as everyone gets the items they paid for, I see nothing untoward or dishonest about it at all.
I have been buying and selling personally on eBay for eleven years. I have worked for electronics suppliers with a web store, as a professional eBay lister, as a flea market vendor, and I am currently employed selling consigned marine equipment. I've seen all kinds of bad business: shoddy merchandise, dishonest sellers AND buyers, shipping SNAFU's, credit card fraud-- you name it. Let me tell you all, from decades of business experience in the "unter-economy": this is much ado about nothing.