Im entirely with Gonzo here. It amazes me how many aircraft cross runway red stop-bars. Very few just say 'red bar' and I'll drop them. Yes Withins we are busy, very busy... but it delays a crew by 5 secs at the very most if they check with me. And it certainly doesnt affect the departure gap.
(I also find it funny that I often get more "red bar" calls on GMC than I do on tower...

)
Basically to any crew reading this... ALWAYS CHECK and never cross a red stop bar to a runway!!!!!!
To sound like a cliche motto; It may be the last time you do it!