> But for SSN I do fib: when asked for SSN (say at a drugstore or whatever) I say "sorry, I'm a foreigner and don't have one".
I'm rarely asked unless there is a regulatory reason they're asking (and then I tell the truth). But when someone wants to know mine for no legitimate reason, I give them Richard Nixon's SSN.
Like when someone asks for an address I simply give the address of the place I am (i.e. the shop asking for it). This works online too, Again, because the person asking (or the person who wrote the web form) typically isn't the person who made the rule, so rather than make life difficult I just inject chaff into the system.
I'm rarely asked unless there is a regulatory reason they're asking (and then I tell the truth). But when someone wants to know mine for no legitimate reason, I give them Richard Nixon's SSN.