Leaning more towards a no. Yes, OOC can feel like you might catch a disease from it but it is often used for actual questions that need answers which might not be at the level for a HD visit but urgent/important enough that it is ideal to have it answered sooner rather than later. Yes, discord exists, but genuine questions on things can sometimes take ages to be answered, which isn't the end of the world but that's when OOC in-game can help, especially to help give new players an understanding even after reading the rules.
Just immediately mute those actually using OOC incorrectly and move on, because there is just as much nonsense in Twitter as well and those who use OOC incorrectly will just move to twitter at which stage you are back to square one.