Use your head and be respectful. The next time you see someone on a dock STOP ! , ask permission , most often they are caught off gaurd and get a favorable reaction .I Ihave met some super nice people that tell sure and no but turn around and tell me to come back at a certain area and or time for some nice places to fish and with what lures to use . Had a deal worked out with an old codger when I went into a specific boating dock community he would generally run people off . I brought him cold beer and a sub sandwich that was my toll lol . Some of the best fishing due to lack of pressure.