Kristi,
"If you followed the rule strictly, it would mean you can't generalize when the maker is unknown. And it can become very confusing!"
Okay; so many questions at once; I suppose my answers are going to sound rather preachy, but keep in mind that my answers are about what I would do and how I feel about certain things. I am not evangelizing, so please keep that in mind if you read this.
JMOho; If I do not know who the maker is, then I simply admit to myself that I don't know who the maker is, fact is fact and it's okay to not know who the maker is and then face the challenge of finding out sometime in the future. Making up information, based on what I know about something else in order to superficially say that something is what I wish it were or hope it is. For me to do that would be lying to myself and I I believe a person who lies to themselves is worse than one who lies to others. I guess my point is; take your time and enjoy collecting, find out what you can when you can, rather than allow a habit of instant gratification to rule your life and rob you of all of the enjoyment in collecting, not just the part of accumulating things.
Still JMOho; To answer a bunch of your other questions; Why remain stuck in a state of arrested development?
Just because something made up or wrong has been the way things were done for so long is no reason to not accept the new found facts and begin to drop using all of the incorrect information.
Collecting, like every other subject should evolve and we should strive to get better at it, which means updating and discarding the old myths, made up names and misconceptions for something more accurate whenever possible. If one isn't striving to get better at collecting then all they are doing is accumulating things and that's not collecting, it's just hoarding.
Selling is another thing and collectors should never allow sellers to make the rules for how collectors collect. What I am posting here is from a collector's point of view only and I suppose some sellers won't like it, because changing anything may mean more work for them, but work is what having a job means.
"Why reject a term like "vaseline" when it has a long history and means a specific thing to many, many people, just because it wasn't used by a glassmaker?"
Because Vaseline is the name of a greasy medicinal ointment for one and my other reason is that Vaseline Glass and the whole goofy black light thing is more of a superficial fad thing, like Beanie Baby collecting and Disco. Sorry if my saying that steps on someone's sacred cow, but I don't worship cows and I'm just being honest, so again it's my own opinion, not my rule.
Okay now; The uranium oxide in the glass gives it it's color. It does nothing to improve the quality of the glass, the basic glass making ingredients, their purity etc., are what determine that. Flowers in a vase made of this glass do not last longer, food served on a dish made of this glass does not taste any better and does not go stale any slower. I could go on and on, but I don't think I need to. The point here is; the item is glass and the glass was not made out of Vaseline, but silica etc., so the term Vaseline Glass itself is inane and only makes those who use the name sound rather uneducated, so what better reason to finally get around to rejecting such a swap-meet term and improving our glass speak vocabulary.
Yes; collecting and learning it often is difficult, but that's what makes it all worth doing. Otherwise one may as well buy and collect Franklin Mint, Bradford Exchange and or the products of any other company who decides for you that their wares are collectables.
Ready, Aim, Fire! lol! --- Mike