Earlier quoted context omitted.
Ehh, remember lots of websites blacked themselves out completely for SOPA and PIPA a few years ago, I think that's evidence enough that they'd be willing to go all out in various circumstances. Honestly, I almost wonder if literally slowing down their service would just be a bit to hard for them to setup in the limited time-frame. I don't really know for sure though, I'm just making a guess.
It would be a pain in the ass, some sites might pull it off, most wouldn't. There's no network configuration-based solution as simple, straightforward, and noninvasive as a JS overlay.
https://httpd.apache.org/docs/trunk/mod/mod_ratelimit.html
http://nginx.org/en/docs/http/ngx_http_core_module.html#limi...