This is a message board, therefore informal and not within the bounds of standard English. Because of this several rules of the English Language are allowed to be bent or broken due to the informality of this board.
klardom, as it is my own fabricated name and not a standard English name, is NOT supposed to be capitalized, as I do not view it to be within the bounds of the English Language. klardom is klardom, period.
But if you really want to go there...
A) You spelled hypocrite wrong, and it should not be capitalized as it is not a proper noun and not at the beginning of a sentence.
B) Mom is a word within the English Language, at least according to the American Heritage Dictionary of the English Language. Mum, however, is not technically an allowed substitute for mother. By definition, mum is an informal abbreviation to ma'am, not mother.
C) My mom is and English Teacher with a Masters Degree, and probably knows one heck of alot more about the English Language than you do. So leave her out of this.
D) Conjuctions are not supposed to be used as the first word of a sentence.
E) Only one punctuation mark is supposed to be used at the end of each sentence.
F) Your use of a semi-colon in your third sentence is improper.
G) Your first sentence is a declaration, not a question, and therefore should not be ended with a question mark.
H) Yes, they are your first and third sentence because "klardom??" is merely a fragment, not a sentence.
I) Personal attacks towards others and their moms arn't really very acceptable on this board unless they're well warranted, which yours weren't; and I have learned this from personal experience.
J) In order to maintain smooth sentence flow, you should add a comma after the word "MOTHER" in your last sentence.
There, I do believe I am done; and just so you know, my corrections of AiR's mistakes were not saying that you must be formal here on this board, instead it was merely demonstrating my grasp of the English Language. My statement about misspellings was also not saying that everything on this board must follow the rules of the English Language in regards to capitalization, it was instead a direct reference to the use of capitalization within formal works of the English Language.