CHEEZ....the things customers ask us to do. Then, when things fail...who is to blame?
I mean...how much more would it cost to add a SMALL amount of series resistance on each leg?
My personal opinion is:
1) I would make an attempt, in writing, to explain the technical reasons to do such and such. Be very specific, and use industry accepted data, not your opinions.
2) That would most likely trigger a response, also in writing. Regardless of the response, both e-mails go into your CYA folder.
3) Do as told by the customer, and if later s**t hits the fan, you have evidence.