Found a decent workaround: Create a "Utility Node" with a bunch of thoughts named "--" or "New" and create pins for a few of them. Now you have a place onscreen to click and jot your thought. Then link and rename it. That green pulsing sphere when you create a new thought is distracting anyway; it's quicker and much more pleasant to click, jot, link and rename an existing one.

yes, I like this too and often wished to have it

This idea could be combined with a "Drop Zone", a place to drag or save random files, notes, whatever that are unlinked. You could create your thought right there or drage something in. Then link it up whenever you decide where it goes. I use a pinned thought to a virtual folder for my drop zone, but it would be good to have a spot on the plex to show them and be able to link them from there.

If this would be implemented, it would for me be an even stronger reason to use PB extensively
Now I need to create a kind of parking space for off topic thoughts during a meeting or such

JJS: good idea. My only point was to make quick idea note taking as easy as possible without the distraction of worrying about later linking. This is an element of some very effective "GTD" systems. Jot the idea down immediately when you think of it.

You're right about needing quick notetaking, but I wouldn't want to litter the plex with disconnected thoughts. F6 instantly creates a new child of whatever node is selected. I'd like an even faster F-function that goes right to the Notes window and lets you jot, creating a linked node from Home with a timestamped name. You can find it easily, rename it and link it up correctly later.