Nudging/overlapping multiple clips?

Probably not. I originally did a longer answer to your question this morning, but the forum managed to destroy it, and I had to go out, so I've only just got the chance to redo it.

Anyway, that answer recognised that the multiple tracks thing might be an issue, and what it comes down to is that you may have to think slightly differently about how you assemble the material. But in the straightforward case of a load of people on different tracks all interrupting each other, you can easily remove chunks across the tracks using Ripple Delete with the correct option. It sometimes looks a bit weird whilst you're doing it, but when you click the mouse away, it seems to work reasonably well and can take time out of all of the tracks, so the synchronisation remains intact.

But if you just have one person who ums to the point where it's irritating then almost invariably you have to decide what bits of them you want to use, and de-um that before inserting the material into Multitrack. That way you don't have to de-umm a load of stuff you aren't going to use, and it makes the final assembly a lot quicker.

After a while, you get so fed up with doing all this (should be unnecessary) editing that you end up training your guests how to behave, and also learning yourself how to deal with them.What generally happens in broadcast discussions is that everything is regulated by the host, and the host indicates when people should speak. If people want to interject, they should use hand signals to indicate this, but still not speak until the host asks them to. If the host wants two guests to have a discussion, or ask each other questions, then this should be agreed in advance. All this tends to keep things on a more even keel, and invariably sounds better to the listener.