@BugmanPrice
I know it's off topic but anyway...
Most neophytes aren't escapees from privat persons or direct trade but are the result of globalization (e.g. 'pest' cockroaches, rats etc.) or of livestock breeding and agronomy which imported and colonized them on purpose (e.g. Australia and rabbits and
Bufo marinus or Mauritius and Réunion and
Herpestes edwardsii). Actually globalization is quite likely the most importent and nearly only cause at the moment because it can't be reduced nor controlled tightly and the possibility that there is a stowaway on one of all those hundred thousend pallets and containers transpoted from continent to continent each day is very likely. Even tourism seems to me to be more important than direct trade of possibly problematic animals/plants (e.g.
Aedes albopictus a vector for several tropical diseases crossing the Swiss alps).
P.S. Even in Switzerland with our direct democracy we have politicians (and citizens of course) with a doubtful right to be on the loose (hope I translated that idiom right

) but eyes and ears are eighter a bit blind and deaf or just some more tolerant...