Generally, the player community should probably drive this - if they feel it's needed, might as well do it.
However, if they feel it's needed, that suggests something else might be happening:
- cheating is suspected
- prizes are significant
In the first case, you should probably take a close look at the concerns, and then tell those players that you've confirmed everything is OK - or catch & DQ a cheater; word will spread.
In the second case, I would talk with the TO and urge them to run at Competitive REL instead. When the prize pool is roughly equivalent to entry fee (e.g., 2 packs per player, $5 entry), then Regular REL is a great idea, esp. for a friendly, local event. When the entry fee goes up, and/or the prize pool goes WAY up (e.g., Power 9 cards for a $20+ entry), players are going to behave competitively, no matter the REL - it's a good idea to match the REL to their behavior and expectations.
d:^D