I have been the only:
- telemark skier at a downhill resort
- paraglider at a hang gliding site
- windsurfer and kiter at a surf break
- SUP amongst a heap of short boarders
In each case people have been polite and friendly. I have heard comments directed at others but that guy is always an arsehole to everybody.
I'm not particularly skilful at any of those things. I never impressed people with my amazing skills (well, maybe sometimes

) I was just a reasonable person acting in a reasonable way and so was everybody else.
In real life the definition of sanity is the ability to self-regulate your internal dialogue. To not say the first dumb thing you think of. It's only on the internet that normally sane people feel the need to spout the first thing that pops into their head.