Re-read the OP. His opponent DIDN'T complain. He informed him AFTER the set that it could be considered a shark move, and he should avoid it. Both of which are obviously true, and which the OP clearly didn't know. Words to the wise.
Thank you kindly.
Hmm, I did re-read it and yes he complained after the game, and the complainer didn't say anything like "could be considered" a shark move, he called it a shark move, period, according to the OP. I guess you'd have to be there to see the context, but I think I characterized it accurately based on what was posted.
In any case, my point was that there's a difference between "less than perfect etiquette," which is what I'd call getting or putting down your cue, and true unsportsmanlike sharking that deserves a direct complaint.