I don't understand how these people are getting their coins seized. They can't have had the properly/safely stored or backed up. Pretty stupid keeping them where you live or conduct your business from if you're doing something dodgy.
These things will not help bitcoin to go mainstream, I also know you can (maybe) do these things also with all the FIAT currencies... but people like to use bitcoin....
Don't talk stupid. Maybe? Of course you can buy guns with cash both online, on the street or at gun shops.