Is it useful to have multiple Scavenging Stations in one Settlement?

More stations, more junk. Anyone without a job should have a scavenging table.

Yes, each provides it's own production.

Some items will seam to appear more frequently when you have many, but this is just a rule of averages, rare items appear more because there are more chances for them to appear, the actual proportion does not change.

When you get nearly thirty settlements, one in each place feeding the same resource pool seems better to me than wasting an extra settler's assignment for just junk.

Seriously, at higher levels, when you go into your workshop inventory and find out you still have like 47 toilet plungers in there.....

I asked this because its really rare to get a bit random Ammo even with an higher Amount of Scavengers. It looks like i get every 4 or 5 Days a bit of them. Thats why i was wondering of the use of multiple Stations.

Lady and gentlemen toilet in each settlement and you still need more