Ethical question/ how to beat a "beginner"

[wilcs18]

I'm a semi-serious player-- I started a year ago and since have made several successful trips to various casinos (under age though) but most of my playing comes at school, with the same 5-8 guys every time, we are all pretty similar in skill except a few who are new to the game. This is my first post on 2 + 2

A few weeks ago I was playing and looked down at a K with a moderate kicker-- nothing too special. I was on the BB and checked after all but 1 limped in.
Imagine my surprise when the flop came KKK, giving me the absolute nuts. I checked, opponent checked, turn came.
We both checked again. River came same as the turn, giving the board a full house, which I of course beat with my 4K's.
As soon as the player checked to me i moved all in.
The problem is, the player i was against is somewhat inexperienced, and asked me why i was going all in. I explained that there was a full house on the board, and, i implied that if we both had the full house on the board we would split the pot if he called, and said that "i might just be trying to steal the blinds", encouraging him to call. I didn't specifically tell him to call, but I implied that it would lead to a split pot.
Was this wrong? people watching were split both ways. As it was he called and I flipped my K, showing him i had "tricked him" and won a monster pot. he was a good sport, and I fet justified because table talk is a form of bluffing-- even thought he was a beginner, i felt he should have known better if you knew the guy. But was this against the "spirit of the game?"
thoughts and advice are greatly appreciated.
Jon :spade: