Recently I have been seeing a large number of suggested edits from a single op, changing the tag on older questions from 'installation' to 'system-installation' After the first dozen or so, I have started rejecting these edits as 'too minor' as a) this is the only edit to the question and b) The op seems to be either on a kick to replace all the 'installation' tags or to build reputation points 2 at a time, by finding all older posts with that tag.
An example of such a suggested edit is at https://askubuntu.com/review/suggested-edits/307128