It’s weird, isn’t “seeding”, as in paul’s comment context, otherwise know as “campaigning” & “canvassing”? Something that happens during every voting cycle, regardless of party affiliation.
Real “seeding” sounds a lot more like your example.
The only real issue is whether strangers should be allowed to collect your ballot and submit it. Which a bunch of states allow. And both parties partake. So I’m not sure what the big deal is.