Reddit admins have already put things in place to counter editing or deleting comments.
I deleted an account from 2011 yet when I searched on Google for “site:reddit.com account name”, it listed loads of posts with their previous content (I used the script that changed all the contents before deleting).
All SM sites have been doing this for a while: they’ll shadow delete your account but will retain all the data.
The council being cheap lazy bastards have said ‘ooh… More temporary signs. That should work!’.
Restaurant owner: speed camera to dish out fines. Make them pay!
Road design should be that it’s impossible to approach that roundabout at speed. All good road design dictates driver behaviour, not allow them to make rash or irrational choices that endanger others.