They will not get involved with you if you don’t approach them. Don’t do business with them. These guys are not messing around.
However, I have had numerous experiences with people in the group you mentioned. I lived in a neighborhood where they had a clubhouse and it was much quieter and had less crime during their time there.
I worked in a kitchen at a restaurant they frequented for private parties close to that clubhouse. They smoked so much hash. This was decades ago. They tipped very well, were polite to the staff, and never caused a scene (we had a separate entrance in the back they used).
I have been aquatinted with people who were in different states of involvement with them. They had different outcomes. Some fine (tangential to crime not really involved) and others who fared worse. The fared worse guys were like useful pretty criminals who they took advantage of because they wanted to be associated with that group and wouldn’t take the hint to get lost. I’m not discussing specifics.
Finally, if you’re life their neighbour and they ask you to come over for a beer just say you’re busy. If a guy shows up from out of town and you run into him in the driveway don’t ask why he’s there. They won’t involve you in their business but might notice if you seem curious.