For 2 reasons really. Firstly it would enable vandals to submit useless questions. Secondly, it might confuse the flag system and would increase the work load for Supervisors who'd have to go through and trash any nonsense created.
In an answer to a question all punctuation marks are possible, but in a question on WikiAnswers the only punctuation that is allowed are apostrophes and question marks.
That only applies to the questions and is a technical limitation.
Valid punctuation marks in English include the period, the question mark, the comma, and the apostrophe. Other valid marks are the exclamation point, quotation marks, the colon, and semicolon.
Cause it's dumb an needs an update.
Generally, punctuation marks such as periods and question marks will precede the final quotation mark at the end of the sentence.
WikiAnswers wishes for you to use commas and proper punctuation in your answers, but only question marks and a few other symbols are allowed in asking questions. The use of periods and hyphens are sometimes allowed, as well as other specialized characters such as the degree ° symbol.
The compound with formula K4Fe(CN)6 (which I know cannot be written properly on the question input page because of its ban on punctuation marks other than question marks!) is called potassium ferrocyanide.
A subject, predicate, period, and other punctuation marks.
Formal punctuation refers to the correct and proper use of punctuation marks in writing, following the rules of grammar and style. This includes using commas, periods, colons, semicolons, and other punctuation marks appropriately to enhance clarity and readability in written communication.
Most of them are down in the lower right corner. The comma, period, slash and question mark are there, with the colon, semicolon and quotes; the exclamation point is at the upper left, generally shift-1. Other special characters are across the shifted numbers.
You can include the quote - just not the quotation marks. You could post a question similar to...Who said Romeo Romeo where for art thou Romeo - even without the quotes and other punctuation marks, it still makes sense.
If you are posing a question, use a question mark (?) for punctuation.