Memes will not ruin DnD lol.

You can explain rules to new players or even flex the rules. It's a game to have fun, not some sacred ritual to be protected and preserved.

Being the "um actually" guy does nothing but turn people off of the DnD community, and I would argue does more damage than people making jokes and not understanding the rules.

I've played with people that are intimidated by the rules and scope of the game. The way I handle it is just ease into it, don't be a stickler. The most important part is having fun!