I don’t think it’s offensive, but I think it’s a waste of time for the following reasons: 1. It’s clear to me that everyone’s stutter is different. I listen to stuttering podcasts and the stutters that a lot of the guests/hosts have are very very different to mine. 2. If I try to mimic a stutter, it is nothing like the real thing. You cannot mimic what a block feels like. You simply can’t.