The fonts and colors people sometimes use are occasionally ugly as well, but there still is the option to use them, and I don't see any complaints concerning that.
Same deal with [title] tags. They don't work well with mobile either, yet there's no complaints about those. It might cause a slight inconvenience, but if someone wants to read spoilers, then why not log on to the main site through a computer? Is mobile compatibility really that important of a function to PC?
I sound like I'm blowing this up to be PC's next killer app and that it must be added at all costs, don't I? But really, it's nothing important. Just a neat little tool I like on other sites and would be nice if it were implemented here.