In our case, this can greatly reduce number of useless writes to DB due to automated moss farms based on lava, water and pistons.
Some of our players uses 1-3 of this farms and average number of pages during /co inspect on each block is about 10k (dispenser placed, water broke, dispenser placed, water broke, ...)

Thanks!

See the "Disable Logging" section of the configuration documentation.

This is already possible, you need to create a blacklist.txt file and add #dispenser to it.

I'm completely forgot about blacklist :/
Thanks, @Podgorica