other logged-in users can take responsibility for by making the edit under their own account

How are the edits being attributed to the actual author?

See T149961 where it says,

send it into the suggestor queue, disclaiming that they are waiving their right to attribution (maybe explicitly put the edit into the public domain/CC-0?).

In T258302#6316354, @JJMC89 wrote:

How are the edits being attributed to the actual author?

Also the target audience for this is casual Tor users who want to remain anonymous and not necessarily be attributed.

To not have attribution an explicit agreement to license the edit under soemthiing like CC0 (no attribution needed) is necessary. That license would also need to be noted when the content is added to the wiki.

In T258302#6316400, @Legoktm wrote:

Also the target audience for this is casual Tor users who want to remain anonymous and not necessarily be attributed.

Attribution is required under CC BY-SA, which all edits are licensed under unless a freer compatible licnse not requiring attribution is specified. Without attribution to the Tor editor, the editor actually making the edit would be falsely attributed.

For spelling corrections and other minor changes that are not copyrightable, then attribution is not needed. Any copyrightable change will need it though unless a freer compatible licnse is specified.

I am not really opposed to it, but this will provide a loophole on (at least) both English Wikipedia and WMF banning policies (specifically https://en.wikipedia.org/wiki/Wikipedia:PROXYING and https://meta.wikimedia.org/wiki/WMF_Global_Ban_Policy#proxying).

As https://meta.wikimedia.org/wiki/WMF_Global_Ban_Policy has some legal consequences, tag WMF Legal for review. Copyright issue needing review too.

In T258302#6323482, @Bugreporter wrote:

As https://meta.wikimedia.org/wiki/WMF_Global_Ban_Policy has some legal consequences, tag WMF Legal for review.

@Bugreporter: See https://phabricator.wikimedia.org/project/profile/28/ :
Please contact the Legal Team directly; Phabricator is not the place to expect or receive feedback.