A lot of really good points to assist your challenges and help shape your walk. Simply put it's a catch 20 and the stakes are a lot different now than 10-20 years ago.
People snitch and they die in certain HS's, trust me. Most likely if your school has these kinds of issues they will "plant" narcs inside to do the dirty work. In this case it would be off of your hands to be the hero because you should be concentrating on grades, sports, arts, & dealing with social behaviors and just being a HS kid that has passion to do the right thing.
Getting all amped up is cool but it attracts attention (unwanted) from your peeps even if you think you're not sending a message you are and it could be dangerous, seriously. Of course this all depends on how tough a high school you're in and it's all relative.
We knew, back in the day who the narcs were that were planted and it didn't matter to some if they were connected to the cops which can also be a tough ride but at least it's not you having to walk the halls with a 9 and a big stick.
Let the resident cop deal with it and don't make it look like you're the guardian angels as you'll still be on someone's radar. Be cool, be smart, & hang with all races and groups from the techs to jocks and be known but blend in.
You'll be fine because you "care" and your heart is in the right place so don't change a thing just work on how to infuse your passions with the people that can help. It's clean and won't drive the masses into thinking you're a snitch because if they think that so will the teachers and to be honest some of the teachers we have today are suspect in their own characteristics and walk...
Good luck man! I'm diggin' your vision & passion for doing the right thing -
Just be careful.
C