I don't mind a modification that shows skill, workmanship and a good relation between "initial need" and "actual task performed efficiently". I guess others agree too since the Parker-Hale sportered Lee Enfield sell for a high price. A botched sporterization done without skill or showing improper use of the wrong tool, I have a harder time looking at it.
In a way, the one sporterized No4 I have, with shortened barrel and drilled receiver, actually shoots straight and is a good hunting rifle... Sure I would have refurbed it if the metal was intact or if it was the last LE on the planet, but... Hey, it's a cool deer hunting rig.
Lou