I was in the gym today doing some convention deadlifts when one of the 130lb personal trainers came over and told me that the place was a "family gym" and slamming the weight on the eccentric portion is dangerous and the sound bothers other patrons. I have been deadlifting for 6 months and have been injury free since I started and do not agree with this statement and would never take a 130lb personal trainer seriously.
However, this got me thinking, for a BODYBUILDER is performing the eccentric portion slowly optimal when doing convention/sumo deadlifts? If I were to perform the eccentric portion slowly I would definitely not be able to deadlift as much as I do now. How do you perform the eccentric portion specifically with regards to deadlifts?