I actively encourage the editing of any of my Question, Answer, and Tag Wiki content on all StackExchange sites except for meta sites. In other words, if you spot an inaccuracy or wish to clarify or improve a post of mine, add sources, etc., PLEASE do so! It will greatly benefit the net welfare and knowledge capital of the community. I am writing this here just in case you are of the misconception that answers are like forum posts, indelible articles authored by a single person.
The edit function is there for a reason, folks. I promise to never lash out at someone for substantially editing content originally authored by me, as long as your edit is constructive. If you don't yet have the site privilege to make instantaneous edits and I see your edit in the suggestion queue, I will do my best to either accept your edit outright, or incorporate the most useful parts of your edit into my post by "editing your edit".
If you have been told before that you shouldn't substantially edit others' answers, or if you've been the victim of polemic as a result of doing so, I'd like to apologize for that behavior. I think it's very counterproductive; our community is much worse-off for that kind of attitude.
Future visitors are best served by being able to read one cohesive, well-edited answer with sources to get the sum-total of the community's best knowledge in a single answer. A string of answers or comments each with their own nuggets of truth is much harder to decipher than one cohesive text. With the edit function, thanks to the fact that we each bring our own perspectives and unique knowledge, it is possible for us to author one cohesive text that eliminates the natural tendency of comment strings, replacing it with high-quality works that rival those of Wikipedia.
BTW, I don't approve of most edits on meta sites because I very rarely find questions on meta sites which deal purely in factual matters, so my answers are generally just my personal feelings on the matter.
Q&A for computer enthusiasts and power users
Q&A for passionate videogamers on all platforms
Q&A for people seeking specific software recommendations
Q&A for professional and enthusiast programmers
Q&A for Ubuntu users and developers
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for system and network administrators
Q&A for aircraft pilots, mechanics, and enthusiasts
Q&A for information security professionals
Q&A for people organizing, marketing or licensing open source development projects
Q&A for software quality control experts, automation engineers, and software testers
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Q&A for researchers, developers, and users of Tor
Q&A for people interested in improving and participating in the patent system
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Q&A for enthusiasts and power users of the Android operating system
Q&A for members of the workforce navigating the professional setting
Q&A for science fiction and fantasy enthusiasts
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for speakers of other languages learning English
Q&A for apps, scripts, and development with the Stack Exchange API
Q&A for professional programmers interested in conceptual questions about software development
Q&A for people studying math at any level and professionals in related fields
Q&A for power users of web applications
Q&A for user experience researchers and experts
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Q&A for theoretical computer scientists and researchers in related fields
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
Q&A for pet owners, caretakers, breeders, veterinarians, and trainers
Q&A for musicians, students, and enthusiasts
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation
Q&A for programming puzzle enthusiasts and code golfers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Spanish language
Q&A for people looking to bypass life's everyday problems with simple tricks
Q&A for students, researchers and practitioners of computer science