Imagine if ads had remained a single static banner at the top/bottom of the page and was hosted by the site itself. Maybe there wouldn't be an arms race to infiltrate every aspect of our digital lives.
Like reddit, you assume this is reddit's data and not owned by the people who posted it. Each individual should choose for themselves if they want it there or not, full stop. Of course reddit has the right to re-post what you delete, so it's just a never-ending arms race if it is that important to reddit to have that there. They cannot, however, ever claim that they own those words, images, video, or audio to the extent that they can ban you from sharing it elsewhere. Disclaimer: IANAL.
My recommendation is for anything that you put your own passion and time into that you self-host, or at least have the original copy somewhere. Then share that via URL whether it be on lemmy, reddit, your own blog, whatever. Social aggregators, IMO, shouldn't be the source of any technical documentation whatsoever.
Personally I'd keep them separate unless space is an issue.
For a scanner I like my Cannon LiDE 110 It just works with simplescan. For printers, any laser that supports PCL or Postscript should be fine. I'd recommend Lexmark or Brother. For black-only, I like my Lexmark B3340. I have a couple of older HP color lasers but honestly don't really use them except for printing trail maps every now and then. For color pictures (and the maps) I now use a Canon Selphy CP1300.
Rather than per client, I'd prefer this on the server side.