This issue has many different facets. Too many to comprehensively address in a forum post.So, let me see if I understand what you are saying correctly.
You think loud pipe annoy people.
Do you agree that loud pipe increase safety for the rider? (This is a given THEY DO!)
But you believe that the additional safety does not outweigh the annoyance to others?
Virtually everyone agrees that noise is annoying, therefore noisy pipes are annoying. However, some would make a case that noise such as a rock band or children playing is not annoying. Therefore some noise may be tolerated. Beyond a fairly low decibel, all noise is usually annoying and always damaging to your hearing.
Safety: Noise increasing safety is anything but a given. There are no conclusive studies showing this to be true. The argument is that if you can be heard you will be seen. Unfortunately, these two ideas "heard" and "seen" are not mutually inclusive. The way sound emanates is the problem. Because a bikes sound is directed backwards, it is annoying to the people who are most likely to see you anyway and statistically accidents caused from behind are the lowest rate of vehicle / motorcycle accidents. As the sound is directed backwards, people in front of you are not likely to hear you and this statistically is where the highest rate of vehicle / motorcycle accidents occur. This includes people pulling over when you are in their blind spot or pulling in front of you from side roads, both of which happen in front of you where the noise is least likely to be heard. Also, it is difficult to immediately determine where noise is coming from and an accident will occur far faster than the time needed to determine the source of the noise.
Now if the whole issue was about safety, being seen is a stronger argument than being heard. This is because the speed of light is about the fastest speed on earth and far faster than the speed of sound. And light is what you see. So being seen is more important than being heard. Now it is interesting that all of the so called "safety conscious" bikers defending loud pipes, are also the most likely to be averse to wearing bright colors such as orange, yellow and hi-viz green which are the most common colors used in traffic safety signs. One of the least visible colors "black" which is actually the absence of color is the most preferred color for motorcycle attire.
As for the many other facets in this issue, I would suggest a psychological study as to why someone would want to be annoyingly loud in the first place. And, why in a hobby promoting individualism and freedom, does everyone want to conform by looking alike??
Now I'll admit, I like black. My Fury is black, my bike luggage is black and my riding suit is black. My helmet however is yellow (helmets are a safety topic for a different post). I also still have reflectors on my bike.
The helmet is yellow because I wanted a Shoei J-Cruise and went to E-bay to find a clearance deal on a new one. I wanted a black one but the bids always went up to around $450. Then I found a yellow one with few bids and a starting bid of $200. Apparently few bikers were willing to bid on a yellow helmet so I obtained it for $250. I take a lot of ribbing about my yellow helmet and I have taken to calling it my "please don't kill me city helmet". I can assure you, this helmet gets seen! Apparently my desire for a good deal exceeds my desire to be safe!
As to the reflectors, I will share my personal experience. Driving my car along a country road in pitch blackness, my wife said what is that in front of us? Neither of us could see what it was but it looked like moving lights. As we got closer, we realized it was a very long black freight train crossing in front of us on a very black night. The only thing that stopped us from hitting it was our headlights illuminating the reflectors on the side of the train. So no matter what the reflector police say, mine won't come off because of their ribbing. What did succeed in getting me to take the back fender ones off was my Ginz sissy bar as the reflectors were in the way. Apparently my desire for a Ginz bar exceeded my desire to be safe!
We are each entitled to an opinion. Mine is - please keep your annoying noisy pipes away from me. More importantly, if we don't stop annoying people, regulators will do it for us and our hobby will be restricted far more than just legislating the noise from the pipes. Also, imagine the absurdity of every vehicle on the road being loud because each owner says it is keeping them safe.
And my plug for visibility and helmets - be seen and protect your head for those who love you even if that's only your mother!!
It might be nice to save someone a lifetime of guilt for killing you too as it was quite unlikely they set out to do it intentionally.