I went round and round with DirecTv on this one as well. Customer insisted on having me put the dish in a flower pot. DirecTv backed him up on it. I refused. No one really cares because if anything happens it falls on you and your insurance. Everyone else will look the other way. Word to the wise - don't let them intimidate you into doing something you know is wrong.
This is CABL.com posting #177701. Tiny Link: cabl.co/mUoj