I don't have anything against anyone mining with their gaming rig, or spare cards, out of their house for some extra cash.
There are two things I take issue with though:
People who are buying stuff in bulk - these are the folks who are looking at upgrading their house electrical serivces because they maxed out their 200A service in their garage. They get boxes of GPUs out the back door of Best Buy -- or in even worse cases, are buying in big enough they just get pallets straight from the AIB or nVidia. This isn't people just using their gaming rig or old spare gear, these are people who are actively destroying the rest of the gaming community for profit.
The folks who try to talk other people into investing their money. It's one thing to do what you want with your own money, but to actively try to recruit other people out there to throw their own money at it - that's .... irresponsible. I've had a lot of folks I know lose a lot of money over this. Now, this applies to any investment advice - people should know better than to just listen to their buddies and go throw their entire 401K at something (and lose it all), but it happens. I feel sorry for the folks that fall for it, but I do recognize the flip side of that coin is "They shoulda known better". For the people giving out that advice - it's entirely self serving, because I feel they are trying to just legitimize their own investments and further propogate and legitimize the use of Crypto. It's a very luring song to hear about how someone is earning $xx dollars per day doing nothing but running a program on their computer - but that is far from the same thing as dumping your entire 401K into a cyrpto portfolio. You can be pro-crypto without attempting to get other people to drink the koolaid.
Not accusing anyone here of doing either of those things though - to be clear. There are folks here that happen to mine, and from what I understand of it, they are cool in my book. And I don't see anyone out here shilling for folks to go dump their life savings into a crypto wallet - although I hope we are all saavy enough here to realize that we shouldn't blindly take investment advice from random internet folks.