> I think this is a reach - after all, if you wanted to discredit a tool for people in oppressive regimes, people who care about their privacy, and people doing illegal things, why start with the programming help site? (I know SE has other sites, but the biggest ones are for tech help)

My guess is they'd target websites that are important to TOR users, and tor.stackexchange.com is one of them. I also don't think they started with SE. TOR IPs are continually filtered by Google, Cloudflare, and other automated firewalls.