"Hand blown" and "mouth blown" are often seen in descriptions of Murano, and other, millefiori paperweights. And the terms also appear on labels used on items that are clearly not "blown" in the normal sense. Those terms may be acceptable within generic "marketing names", or even "company names", but when seen in descriptions for solid paperweights, it is misleading.
Butterflies such as those linked to above are clearly lampworked, not blown in any way. Even the canes they are often formed from have not been blown. Probably the majority of GMB readers will have known that. But again, people new to glass, or its ways of being worked, can easily be mislead.
It's a pity, but it is one of the things that the 'wonderful world of the internet' makes so much easier to pass on without proper background or context.