If by 'accountability' you mean the ability for site ops to unilaterally de-anonymise Tor users, then no; Tor users will never agree to that.
If SE executives are really concerned about spam and vandalism by anonymous actors, then SE could Tor users to post assets in escrow (e.g. Monero) before posting. Similarly, if SE executives are concerned about denial-of-service attacks, then SE could rate-limit the sites that are causing the attacks; Tor is not efficient for that kind of attack anyway. There is no sound argument that blocking Tor entirely would further the interests of SE users.
This is the act of a monopolist in secular decline.
If SE executives are really concerned about spam and vandalism by anonymous actors, then SE could Tor users to post assets in escrow (e.g. Monero) before posting. Similarly, if SE executives are concerned about denial-of-service attacks, then SE could rate-limit the sites that are causing the attacks; Tor is not efficient for that kind of attack anyway. There is no sound argument that blocking Tor entirely would further the interests of SE users.
This is the act of a monopolist in secular decline.