Well, tjspompa, if you have ever seen the dreaded spanish/iberian slugs, Arion vulgaris and A. lusitanicus, then you will swallow your words. These horrible creatures are invasive and eat the small garden slug and its eggs, it has virtually eradicated the snails in shells. They measure over 4 inches, are reddish/orange-brown and incredibly slimy, which makes it difficult and sometimes fatal for frogs, ducks and other mammals to try and eat them. Young ducks have been known to choke to death on them.
This slug van destroy a 2 foot sunflower overnight. Beer traps invite more of these creatures from neighbours, dead slugs invite them for a "funeral" snack. Copper tape around precious plants are a deterrent.
After having encountered these revolting and destructive creatures here in Europe, I almost find the little brown garden slug "cute". Every time I find an empty shell of the common garden snail, it saddens me.