2. You're also right that you can mix sharps and flats when refering directly to a specific scale in a specific key i.e. G Harmonic minor is G,A,Bb,C,D,Eb,F#. But a specific scale is not what I'm talking about. I'm refering to a scale FORMULA, the intervals that make up the scale and how they relate to the major scale. Scale formulas tell you far more than a key ever would and they are independant from keys. They tell you about the tonality of the scale which is the most important thing when talking about notes that are enharmonic. Save for your more exotic scales, no scale formula mixes sharps and flats. In fact the only mode from the major scale that uses a sharp as an alteration is Lydian. Every other mode is altered by flattening one or more notes. Pentatonics are included in this as they are basically major or minor scales with notes taken away.
3. The blues scale is a minor pentatonic with the b5 added. It would NEVER be refered to as a #4 if you were playing it in a blues setting. I'm absolutely positive about this. Read a book on blues guitar and see if they call it a #4. My bet is you'll feel stupid after doing this.
This right here I think shows how off you are.but it makes more sense to call it a #4 because the b5 refers to chords of diminished quality. another example is the maj9#11 chord: have you ever seen it refered to as maj9b5? if you wrote it with the b5 rather than the #11, it confuses the player because they wouldn't know whether or not they should keep the perfect 5th as well. by calling it a #4, the player has no confusion about the quality of the chord's actual 5th.
First of all why in the name of Zeus' butthole would a player be confused as to whether he should play a perfect 5th or not? That's a seriously rediculous thing to say. The perfect 5th, particularly in a maj9#11, would do almost nothing to change the tonality of the chord. It's a perfect interval! A player that could play a maj9#11 and locate the perfect fifth surely would be competant enough to decide if he should play it or not. I'm also not understanding why calling that chord a #11 tells you whether or not to play the perfect fifth any more than calling it a b5 does. Explain yourself.
I can see you're new here and obviously trying to flex your theory muscles but you're only traveling deeper into "I'm full of shit" territory. You know what you're talking about to a certain extent, I'll give you that, but you're wrong in this case.
Oh well, proceed with your fruitless efforts to prove me wrong, if you must.