good on you Mark! Possibly got the response that one would expect, but glad you gave it a shot.
On bikes we take up the smallest bit of road and it is pretty rich when someone blocks the fragile bit of territory temporarily lent to cyclists (most bike lanes are for 7-9 am or 4-6pm).
I don't bother pointing out bike lanes anymore. Years ago I thumped on a rear window of a 4WD that overtook, cut me off and double parked in front of me and blocking the bike lane on the Parade. I got it out my system but ultimately, when I calmed down, felt like a total dickhead (no change from usual!).
Bike lane blockers are a pain in the arse, but they will always exist when bike lanes are made to "share" the road.
as in this definition meaning your pic attached to each message not a blue man from another planet :) lol