Well, what an interesting topic this is turning out to be!
One thing seems to be abundantly clear. A number of upwardly mobile young folk, who have not yet attended uni and whose scientific knowledge is still a bit wonky, seem to believe that the use of binomials, sometimes misnamed "latin names" and the like, brings them closer to being "serious hobbyists". Since most of them have never used a dichotomous key in their lives (and with a little luck may never do so, eh, Superfreak?), they are not sure why they should be using binomials and have invented the fiction of the ubiquitous "flower mantis" that is apparently used for countless species. I say "fiction," because, of the 100+ common names with which I am familiar, "flower mantis" is never used alone any more than a genus name, like Creobroter is used alone. Certainly there is a Taiwanese flower mantis, a jewelled flower mantis and even a West African flower mantis (Chloroharpax modesta--thanks Yen!), but these are as easy to tell apart as the species of any genus.
I think that Christian makes a fundamental point when he complains that English speaking people are the "worst" at using common names. He's absolutely right about that but mistaken, in the case on the U.K. and USA, when stating that common names work only for birds and mamals. That famous scholar, Robert C. Stebbins, in his definitive
Western Reptiles and Amphibians, not only gave common names to all of the reptiles and amphibians west of the Mississippi, but in some cases, improved on them, giving one of my local favorites the new name of Sonoran Desert Toad instead of Colorado River toad. There are about 775 species of Nearctic butterflies, excluding the skippers (Hesperiidae, below the superfamily level
) and every one has a common name. The same is true of beetles. Who could resist the pleasant fungus beetle or the confused flour beetle? With regards to birds, there is an American organization, the American Ornithologist's Union, that authors a list of all the common names of birds in the U.S. (it was they who changed the name of my sparrowhawk to "American Kestrel" :angry: ). Perhaps, though some of the members of this forum might choose to get together to establish a list of common names for English speakers and clear up some of the minor confusion that still exists.
The use of common names may well be eschewed in Europe, but it is followed in the US, and also in England. I would never go on a European mantis forum and press the benefits of common names, and am not quite sure why some European members, welcome as they are, not only criticize Americans on this American forum for their use of common names, but accuse them of "ignorance" and "laziness." Such terminology almost smacks of religious conviction, where non believers are excoriated for their moral turpitude and threatened with damnation. In this case, that is represented as "ruining the hobby," nebulous and never defined, but apropriately scary. We can only hope that the "serious" binomial using hobbyists will be translated to glory before that happens.
There is another, more unfortunate, side to the use of binomials by folks with no scientific education. The likelihood of error is much higher than when using common names. The most obvious is the misuse of the form. The Genus name is capitalized, the species or trivial name is not. The commonest error is to capitalize the species name, but there are others, like writing both names in the lower case or, in at least one case, putting a comma after the genus name. I suspect that there are more erroneously used scientific names on this site than correctly used ones. Also, the unfamiliarity of the scientific names increases the chance of their being misspelled. Acromantis farmosa, anyone? As for ensuring whether we have the correct scientific name or not, how many people do we have on the forum who can make such a judgment? That's right! It doesn't leave much of a margin for error, does it?
Finally, as Christian and I have agreed, folks will continue to follow their same old ways regardless. I, though, think that the hobby will survive.