Yeah... but people could have the decency to spoiler alert things and only talk about spoilers in private with people they know have seen it... I'm not gonna avoid the internet for 8 days to use the internet until I watch the season finale of a tv show online just because I was doing something more important when the show was actually was on tv.
Regardless I have never had something unintentionally spoiled on the internet. I also don't use social media though, so that could be part of it.