Many thanks for a lot of very informative replies. Prefer not to say which airfield I'm referring to, but I'm glad to find that I'm not the only person whose buttocks are clenching at the scenario I described
I have had aircraft leave the paved surface onto the grass which tends to concentrate the mind on things like obstructions, and I've also had my concerns about the level of distraction caused by vehicles and personnel on and around the runway at busy times when their tasks could be scheduled for much quieter periods.
Will be taking this up with management. Thanks again.