I don't like being directly in front of cars moving much faster than me, so I don't take the lane - the tire track - very often unless I have to. But when I do, communication is the last thing I want from it. Turn signals, brake lights and horn are communications. When I'm there, it is purely so that a car driver cannot pass me completely within the lane, and that is a safety measure regardless of what the motorist thinks about it. The only thing communicated is "I am not yielding way here".

I'm pressing this point because it looks like you've assigned "communication" as the sole purpose of taking the lane. It's better IMO, driving OR riding, that we don't communicate at all with other drivers other than by standard signals and legal yields and so on. Those communications are generally extra or outside of normal traffic parameters and disruptive more often than not. I'll wave a hesitant driver by sometimes but that's when they've become disruptive already, and that's about it for "extra" communicating. I'm not talking about waving to a friend or that sort of thing, but I AM talking about directing traffic or instructing someone, outside of the normal rules of traffic.