Heavy Transport
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Confusion; Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
General None Reported / Taken
Procedure
Takeoff clearance issued while preceding aircraft still on runway. A group of concerned company pilots have discussed ZZZ ATC as well as other airport controllers issuing takeoff clearances to aircraft while preceding aircraft is still on ground during takeoff roll.  This discussion has come to the attention of ZZZ local safety committee.  This report is being filed to bring attention to the matter and voice our concern.  We hope that this practice will stop before loss of life occurs. It is our request that this concern be shared with other Safety Groups; (FAA; ATC; other airlines) in an attempt to stop tragedy before it occurs.  As our airspace becomes busier and more congested; practices such as this need to be stopped. Respectfully; concerned company pilots.
Pilot reported a re-occurring issue of multiple ATC locations issuing takeoff clearances while preceding departure is still on takeoff roll.