To me, this falls clearly under the category of "thing you can not do if you don't want to", unlike a lot of the more troublesome mechanics. In addition, it doesn't look like it would be something which has an easy "fix" which is also not more obnoxious than leaving it alone.
There's no DM, the game would need programming to decide what to do if players start moving around while someone is in dialogue, and it would be tricky to write code for the game's "director AI" to decide what the player is doing and what reaction is suitable for that.
