I don't like it when they write "April Fools!" at the end. It ruins the fun. Imagine if you punctuated all your jokes with a laugh and a loud "Joking!" ...
- Unless it is during the first few weeks of April, I (and I imagine many others, too) pay no special attention to the exact date a news item or blog post was written (the year: yes, month: maybe, day: no). - Almost everything we write on the Internet is going to be archived for future generations to read.
If topics such as this become irrelevant/non-topical in 10-15 years time, someone coming across this article for research purposes may be drawn in by the ruse.
Just a thought.
The 'April Fool' label prevents that heinous possibility from occurring.