Is it true that glue will hurt planer blades if a glued-up board is run through?
Andy Rae: Nope.
Richard Jones: Some very hard and brittle glues can; e.g., epoxy resin and urea formaldehyde types, but in my experience PVA, polyurethane and hide glue types generally don’t.
Carol Reed: Enough glue squeeze-out can nick sharp edges, so it is better to scrape the squeeze off before planing.