Comment It is not a bank or brokerage account. (Score 2) 230
It is a security hole and all the dire warnings by others are true. Most of these companies are run by people with no IT or computer expertise. The top man is going to haul the IT dept on the carpet and demand an explanation. You think the IT chief is going to admit that he/she was running a moronic system? No, she/he is going to shift blame and find some convenient scape goat. Given the top honchos don't know much about anything other than their bonus calculation, IT chief is going to claim, "It is a hack! That guys hacked into my super secure site". Then the PHBs running the company would call in the lawyers and make a mess out of the situation.
One thing the anonymous guy can do is to call the company that issued the mail-in-rebate and tell them, the outfit they had out sourced their rebate processing has holes in the system. Now it is the very big company that issued the rebate coupons run by PHBs fighting a smaller company that got the rebate processing contract run by PHBs. And quietly withdraw without drawing too much attention.