Yep, and if someone has locked down their profile (for whatever reason) that doesn't stop things, either (although the board will only give you the "User restricts who may view..." message when you click) - it takes nothing more than "right click on the avatar image --> Copy Image Address", then new window (or tab, if you prefer) paste, and presto - there's the version you see as an avatar. Or paste, then look for the "/m/" in the url you just pasted and change the "/m/" to "/o/", and hit return - you're now looking at the raw image that was uploaded and circle-masked to become the avatar image.
Example, using your avatar, humananimal:
right click --> copy Image Address gives me this:
Pasting it into a new window or tab will give the image seen next to your post.
Pasting
https://www.zoovilleforum.net/data/avatars/m/127/127311.jpg?1668463986 then changing the "/m/" to "/o/" before hitting return to load it shows the full, raw, "as you uploaded it" version without the circular mask.
Hit one a while back (probably mid 2021?) where the gal had cropped things to show just her boobs in the circle. I wanted a "closer look" (the larger version that the board will show) so I clicked. Her profile was locked down. OK, no problem - Doing the right-click/copy/paste/m-becomes-o thing revealed a full-length nude, including full, clear face shot, with an envelope that was obviously "incoming mail" laying on the table next to her, with typed name and address slightly fuzzy, but easily readable, in the shot. Warned her via PM, and she gave me a response that boiled down to "I like it as is, go fuck yourself".
I haven't seen her logged on since. Hopefully, she didn't get busted, but... <shrug> Who knows?