[muawiyah]

Yes, it is unacceptable and that's why COSTCO must be put out of business.

A slogan "COSTCO DELANDA EST"

[cycjec]

COSTCO delenda est. (deleo, delere, delevi, deletum)
That assumes “COSTCO” is feminine in gender.
COSTCO delendus est for masculine.
I *could* explain how ppl put “a”s where “e”s belong
but sometimes I’d be wrong and it would just add to
general confusion.