Spices,
Some people think that copying and pasting equals research.
Years ago, a cousin told me: "I was up late last night researching our family tree back to the 1400s!"
She wasn't researching; she was looking at someone else's tree. And who knows if any of it had actually been researched; it was probably cobbled together from other sources.
If I take info from online trees I make sure I note where I found it and that it needs to be ruled in or out. Then, when I can, I do my own research, including finding source documents if possible.
I'm grateful when someone's tree provides me with a clue or, rarely, solid info that I didn't already have but many internet trees are definitely rife with mistakes.
I think I'd freak out a bit if I received a family history booklet showing me and my husband dead!

Josephine