Ok, lets put it this way, what is your concern? I think you are close to paranoia on this issue, clay pigeon cartridges are of no use to anyone other than another clay pigeon shooter, who all have a certificate conditional to them not being a criminal. Your concern that a member of a clay pigeon shooting forum is going to read that a member of said forum keeps 2k of shells in an airing cubord will then track him down, break into his house and rob him of said 2k of shells, that is mildly hysterical at best.
By that logic, why join a forum and advertise that you have a Guerini Apex in your house? Some junky will already be on his way, armed with an angle grinder to open your cabinet, circumcise the barrels/stock into sawn off to hold up your nearest post offce...not likley is it?