Is there anything that looks like a raspberry but isn't?

On further investigations I've found that there's quite a choice out there that don't have any thorns and a few that have the odd one.
Thornless raspberry varieties include:

Autumn treasure
Canby
Glen Lyon
Glen Prosen
Glen Moy
Glen Ample
Glen Doll
Glencoe
Itsaul
Joan J
Mammoth Red
Raspberry Shortcake

And varieties that have just the occasional thorns include:

Cascade Delight
Encore
Latham
Nova
Polka
Tulameen