I can reply from ANY address from my domain including the exact one that was used to send me an email.
I can “deactivate addresses” by sending messages to a particular address straight to trash with rules.
Edit: turns out Fastmail has a masked addresses feature built in, separate from a catch-all. It’s basically simplelogin built in, if you want to enable it. Proton is looking more and more overpriced.
If I were a professional spammer, the first thing I’d do to clean the address list I have is to strip out plus addresses. It’s a simple regex.
On how to filter, I can send any address straight to the trash apparently just like simplelogin. I’ll know who sold or leaked my info because it’s in Bitwarden and I can just search my vault to see who I handed that particular address to.
This is why I just moved from protonmail to Fastmail. With Fastmail I can send from arbitrary addresses using my domain. Why it’s not that simple with proton is beyond me and now that I’ve tested everything with Fastmail these past few weeks, I see it’s a choice.
I almost signed up for simplelogin but realized I was being sold something that should just be included. Plus setup was convoluted as fuck.
Reddit enhancement suite would do manual, single user tagging and the Masstagger browser add on would do… well, mass tagging.
I used it to show me when people I interacted with made more than 50 posts/comments in places like r/conservative or r/thedonald. It would also link you to the comments so you could see what they were saying there.
I found it helpful because there were times when I found people undermining concepts like cultural pluralism and participated in those subs. I knew where they were coming from and what they were trying to convince readers of (nothing good).
Several times it helped me effectively argue against white supremacists.
As long as comments are public, which I think is the point of sites like Reddit, lemmy, and kbin, those types of plugins and info will be available.
I don’t understand the concern though. I always assumed my votes, comments, or even PMs here were readable by at least the admins of the instance I’m a member of. The fact that votes and comments are public doesn’t seem to matter from a security or privacy standpoint.