What do you call people who make Trump a central part of their identity and constantly look for ways to work their hatred of Biden/Democrats in to every situation?
You characterize anyone who uses the phrase "Trump Derangement Syndrome" / "TDS" as an extremist? I suppose most of my friends and family are extremists then, under your definition?
When you use language like this, it dilutes the meaning of the words.
Somewhere around half of the country generally vote for the "right". A significant portion of those folks have use the TDS phrase, to point out an observable phenomenon, of certain high profile people acting in abnormal ways when reacting to Trump.
You are labeling these people "extremists"?
How would you characterize militant racist militias that are (in relatively small numbers) scattered across the country?
Would you lump these people all together under the "extremist" banner?
Or maybe there's a less inflammatory approach?
Yes, people generally have a strong reaction when talking about the sort of low-quality human being that Trump proved to be. That's not a "derangement syndrome." That's called having a sense of humanity and self-awareness.
"Grifter" is not how I'd describe Mark.
Grifter is a term I'd use more with someone like Trump, who doesn't seem to even attempt to make good decisions and lacks altruism.
For example, I sincerely enjoyed that Mark funded that stupid patents thing at the one place years ago, though I'm typing from memory and thus lack the abilty to give a specific citation.
I don't have a ton of capital, but I respect that not everything can come via public funds, and that it's good to give folks the option of donating to organizations they are fond of. (I like to half-jokingly call this "venture socialism" -- the joke being it's more about a smart person choosing to give, rather than the amount, but unfortunately that Signal, like many before it, has been detected and abused by bad actors.)
For example, I'm not a Buffy fan -- it was popular during the VCR era and when piracy was more difficult. So I made a purposeful choice to never enter the fandom and let folks enjoy the spaces for it, on and offline. (Well, that and one of my exes is a huge Buffy Fan, and I simply don't want to run into her without a heads up, and the easiest way to do that is avoid Buffy conventions or any adjacent crap at all costs.)
Along similar lines, even if he ends up being a texting buddy, I'm not gonna hit him up for super bowl tickets, because I don't think I'd enjoy it and there are limited slots for physical events.
Anyways TL;DR: he's not a grifter, just narcissistic and in possession of a bankroll and social network that allows him to make more errors than most folks while maintaining a large following.