But many routers don't support (or allow) using only WEP, or even only WPA/TKIP. Not that I would like to open up my wireless network anyway.
But does someone have experience with setting up a second network (one with WEP or no encryption) within the same subnet as one secured with WPA2? Is it even possible? You need 2 DHCP servers with non-overlapping ranges? Or can computers see each other on separate subnets somehow? All online guides recommend only using one DHCP server, but I suppose most don't have to deal with using WEP in year 2015.
I guess one difference between using WEP and no encryption is a legal one: with WEP you at least tell other people they cant use your network for sending 100 vulgar emails to the pope.
Also, what's the point of encryption anyway: maybe to keep your snooping neighbour out. But against government agencies: they already have infiltrated the end points and also put back-doors into security standards. But maybe the Amiga is so old that it's free from those.