I have PTSD and can’t play games with red blood splatter. Thank you for giving me an accessibility option to not see it.
Tara Windwalker, via Twitter

Blood and gore can be problematic not just due to preference or age, but also due to conditions where it can cause distress and discomfort. It is of course – depending on the mechanic and genre – desirable and / or an important source of realism for many other people. So providing an option allows both ends of the spectrum to be met.

However care must be taken with affordance; for example ensuring that a blood splatter than can be turned off is not the sole means of communicating to a player that a shot has connected with its target.

Best practice example: WWE 2K17
Best practice example: Tripwire
Best practice example: Beeftacular