[qasdfdsaq]

It's not really education when I already know something perfectly well - I just didn't want to go into that much detail when it wasn't relevant to get the point across.

Nonetheless you'll see from my wording and the rest of the thread they're really referring just to echo requests, a router passing data through doesn't "respond to" destination unreachables, etc. they just get passed like any ordinary data onto its destination. You don't send destination unreachables to intermediate routers.