Suggestion: forbid overzealous grammatical "improvements" (at least for articles)
124652
Can I prevent others from editing my question?
144810
Titles should be stand-alone summaries of questions *without* depending on tags
139084
Add the ability to lock a question against edits
142089
Stricter  usage rules
156703
If a question is in all-uppercase or all-lowercase, our quality filters should automatically reject it
16399
Can we prevent titles with an unnecessary tag in them?
150644
Does Stack Exchange insist on a special language for posts? Please describe
157207
Remove trivial edit restriction
38493
How do I deal with wrong or irrelevant edits made to my posts?
20069
Why is it that a noun can be added with -ed?
129645
Are spelling and/or grammar mistakes a cause for submitting Errata?
126277
Allow adding a custom reject reason when marking an edit as "Reject and Edit"
96623
When articles are placed after adjectives?
123601
Omission of the indefinite article to eliminate ambiguity
145053
Can the editor for editing tag descriptions get updated to match the normal questions/answers editor?
36880
Why are trivial edits discouraged?
118444
Please ditch the five-minute window on comment editing