I've been advised in the past by Latter Day Saints missionaries to PRAY to the ancestors in the spirit world for help in my genealogical research. To me this is a form of ancestor worship. I don't actually have a problem with the notion but I also have never prayed for other worldly research assistance.
Maybe this is because an occasional dream has provided guidance instead.
I suspect it is more ethical to pray to your OWN ancestors for help when it comes to genealogy research - or anything else - than to the ancestors of strangers you might be helping or working for.
I do wonder what other people think of this.
I suppose it can't hurt but maybe it can.
Maybe it depends on the focus of the research.