Yep. I'd be way more worried about the other way around, where someone in the future tries to remove their history from Twitter. Fortunately, that shit is going straight to the Library of Congress.
Besides, social media is like a honeypot for haters. Go look at any politician's feed... any POTUS or candidate or even game developer or corporation's Facebook page... Almost every comment is someone whining about them. In the old days of websites you'd try to moderate your blog comment stream, but nowadays they've more or less given up trying to filter out negative commenters... anyone who matters to them doesn't spend time reading the comment stream. And the haters feel like they have an "outlet" to post their negativity on someone's page where they can have a nice circle jerk with all of the other haters in plain view. I bet it comes in handy having a straightforward list of your haters collected right from your own social media stream available to you anytime into the future. Sounds very useful, especially for power-crazy political types.