I'm deliberately not placing this in the Toy Camera forum, since the discussions there seem to start and end with Holga and Diana (it's a short list anyway).
Are there any other 35mm cameras that have plastic lens elements and produce at least mild vignetting -- i.e. ones that don't readily fall under the "lomo" label? Maybe a better (if more naive) question is, how can I recognize a plastic lens versus a glass one? The thrift stores have lots of film cameras and most of them are delightfully cheap. But I'm fairly new to film cameras and my appraisal skills are still in their infancy.
I like the look of plastic, and might still resort to one of the aforementioned proper plastic models. But I'd like to get a feel for what else is out there, and just how ubiquitous plastic lenses really are.