On my work you’ll get to see that kind of out-of-placed lines every-so-often.
It’s not a strict personal rule, but more often than not I restrain from erasing anything on my paper drawings. In fact, in those cases I start directly with a (light) pen rather than with a lead pencil.
There are a few reasons for this. Most should be easy enough to deduce but I may explain it someday if anybody is curious.