If you disagree on what a copy troll is because you're a photographer yourself then we're gonna have to agree to disagree. I've had other people contact me to remove an image from my blog and I apologized and removed it right away. Playboy even sent me a notice telling me to remove their image and I immediately complied. That wasn't the case with Chris Sadowski. He immediately went to extortion letters no different than Linda Ellis with the stuff she does.
Okay, so let's get this straight: hearing from Sadowski wasn't the first time that you'd been contacted by someone to say "
stop using my photographs" - but it was (I'm guessing) the first time you heard directly from an attorney, without prior notice?
Like I said before, there's nothing in US copyright law that says a person has to send a polite "please stop?" notice before they engage counsel. Heck, there's nothing to stop them going straight to filing suit in Federal court if they wanted to, but lawyers tend to advise against that because some judges frown on it - since it shows no prior attempt to settle things outside of an overburdened civil courts system.
Now I obviously don't have all the facts in my possession, but your statement "
I've been blogging since 2009. When I started I didn't know what the heck I was doing. I'd say three times in eight years." implies that you've infringed on a shit-ton of content... simply from the fact that the majority of photographers and rightsholders don't know how to police their work, or don't care to.
The professional photo hosting service Photoshelter held a copyright clinic live stream a few years ago, and during the stream, they published poll results from their members. If I recall, only seven percent of respondents actually registered their work with the US copyright office. Most didn't know how to, and a few more didn't care to. Given that their target audience was professional photographers who pay for a hosting service, then I'd say 7% is a generous figure when you also factor for enthusiasts and the general public. I'd be very surprised if more than 1% of image ever get registered.
Taking those facts into consideration, to be contacted
only three times in eight years is just dumb luck, because every time you posted a photograph to your blog, you had maybe a 1% chance of being caught.
Now, when you got your first polite cease and desist, maybe that should have triggered a thought along the lines of "hey, this could have gone a lot worse for me - perhaps I should change my approach to sourcing images, and clean up my site."
When the second one came in, you might have mistakenly thought "Oh, I can use whatever pictures I want to, so long as I remove them when I'm asked."
Then you used one of Sadowski's registered photos, who (well within his rights), retained counsel and sent a far more formal settlement offer.
Now, all of this is supposition on my part. I don't know in what order you were contacted, or by who. You clearly believe Sadowski's approach to be an overreaction based on previous requests. Let's add perspective by ways of an analogy.
You set out to walk through a crowd. You're not paying attention to everyone around you and, in the course of your travels, you bump into someone, who spills a some of a drink they're carrying onto themselves.
The first person, being polite and non-confrontational, says "Hey man, look where you're going!". You apologize, they accept, you move on - not correcting your behaviour.
The next time you bump into someone, they're also carrying a drink and call you out on your ignorance, but they're also accepting of your simple apology, and quickly get on with their own business.
The third person, however, is different. They're wearing a suit that, in their mind, represents an investment in themselves: one they go to pains to ensure is neat and presentable. You might think it to look unremarkable, but it's one they had tailored. You bump into them, they spill their coffee on it - and before you can utter a word, they're in your face, demanding that you pay for an expensive dry-clean... or perhaps even a replacement suit.
Compared to how the first two responded, you might well think this to be an overreaction (and likely other people could too) but from the perspective of the suit-wearer, they have a legitimate expectation that people look where they are going so as to not bump into them, and getting coffee spilled on their suit - one that has special personal value to them - is not something they will just shrug off with a "hey, no problem" and a smile. Perhaps you thought that, at worst, you'd owe them a $4 cup of coffee, and never imagined facing the prospect of maybe having to pay to replace a bespoke suit.