Re: reasons for a suppressor
Restriction of suppressors came in at the same time as the other $200 tax stamp items, just after the roaring thirties. An outright ban failed on constitutional grounds, so the powers that be, circumvented it via taxation, $200 dollars was the equivilent of twos years average wage at the time. Only for the fact that they neglected to index the tax stamp for inflation, none of you would own anything fun.
The reason suppressors were restricted was over poaching concerns, people were starving at the time.