Quote from PhanxYour original post made it sound like you just wanted a bar for yourself, not for the entire raid, which is what sending it as a sync message will do.
Ah - I thought I had made it clear when I originally posted quoting the /bwcb command that this is what I was intending to emulate. I know others have used this macro command for this purpose, but for myself I was attempting to do it in such a way that I didn't fire spurious bars should I accidentally hit the macro while LS was on cooldown.
As for whether or not it is desirable, I tend to raid within a fixed set of people, most of whom have been in favour of the bar; many of them are reluctant (I'd hate to use the word "fearful"...) about installing addons beyond the "mandated" few our guild prescribe. I tend to be RL and MT, so I like to let everyone know when I hit the panic buttons.
As an additional note, since quoting the macro above (and before reading your reply), I did add an "if 1==1" clause to the bar code to enable me to quickly and easily disable the synch should anyone object. I'll run with it for a while and see how people go.
And to be perfectly honest, I would probably have just given up (partly for the reasons you gave), but once I had the idea, I hated to abandon it simply due to failure; I'm a typical geek in that I needed to solve the problem more than I needed the solution ;-)