... are more of an internet diving problem than an actual real world diving problem.
Sadly you can meet those internet divers in real life later.
Has been a horrible experience for me on most occasions (with several exceptions, but also some exceptionally horrible cases).
With divers you do not know from the internet it is ok, but it becomes harder the more experienced you get, newly certified and obviously inexperienced divers are often treated much better than those that talk instead of listening.
Some reactions are just typical curiosity, sometimes however you talk to people who have already developed an opinion before meeting you.
It depends on local diving culture, but I am often told:
'You do not need this here' and 'This is not a cave, why do you use sidemount here', or 'We do not plan to dive restrictions today, do you?'.
Easy to explain without getting too defensive about it.
However, you can also get drastically different reactions - rarely, but it happens.