If you ONLY use your horn for the purpose for which it is intended, I highly doubt using it would cause someone to become aggressive.
I have only used my horn a few times and that was in a parking lot when someone was backing up, not realizing they were on a course to hit my car OR when a car attempted to change lanes without checking their blind spot. So, just to protect my car from being damaged or to avoid a collision. Neither of which would typically cause an aggressive response from another motorist. Another time I used my horn when I saw a Duncan Donut tray with coffees and a bag on top of a motorist's vehicle while driving down the road.
Now, if you beep your horn for other reasons, that might anger a driver who has emotional issues, who would respond aggressively. I have been driving since 1976 and no motorist ever aggressively charged my vehicle after I used my horn.
I think if you use your horn properly, there should be no issues.