There are also naughty people who either comment more than once, some who i suspect use multiple accounts to comment on posts,...

Yes, you are right! I’m sure it bothers most of us, but then I’m thinking 🤔... these people with multiple accounts making multiple comments are at some point desperate, at least most of them. I try to use my common sense to see who is real and who is just trying to take an advantage of us by spamming. You’ve done an amazing job with a little help of spam catchers. However, I love your way of rewarding. Your rewards go to them as well, because you know they at some point spend their time to make a at least a bit meaningful comments even if they are spammers with multiple accounts. Most real people here really appreciate what you do here including me.
Here is few pictures of my choice of planted pickup truck to contribute in both subjects.