Your last post is your best Dave re; the reputation and getting penalised.
Your first post re. "Averaging just about one penalty per game for high tackles isn't good and is not mitigated by whatever else he does." is your worst in as long as I can remember Dave.
To the best of my knowledge, Lockers only concedes penalties for high tackles. If we accept your view that he has a tackling problem then I would say you notion it is inexcusable (mitigated) by whatever else he does is absolutely poppy cock. Martin Offiah was a terrible defender but we excused it because of what he did when we had the ball. Kelvin Skerrett gave penalties away. However, it was part of role to enforce himself on the opposition, we excused it. Terry Newton gave away countless penalties yet our defensive record with him in the team was better and he was a great hooker, we excused it. Lockers is making 30 to 40 tackles, taking the ball up well. He is vital to our team. THAT far outweight the odd penalty.
Bryn Hargreaves never conceded a single penalty when playing for Wigan. Who would you rather have at prop, Bryn or Scott Logan?
St Helens conceded a very high number of penalties. I believe they actually do so deliberately when they get ahead, taking the view 2 points is better than 6.
I may be right or wrong but my impression is the number of penalties in RL has increased in recent times. I would also like to see whether Lockers conceded more or less penalties early in the game / later, when the best team is on the pitch / substitutes are on, when a player from the opposition is simply making yards / or threatening the tryline. So many variables to consider.
Lockers has not hurt a single opponent to the best of my knowledge. He is not stiff arming opponents. He is an excellent tackler who is vigorous in his tackling technique, if he was playing in Aus he would conceded far less penalties. Essentially he is taking opponents 1 on 1 and he is attempting to hit above the ball, being light compared to say props he throws himself into the tackle and his arm comes over and around the ball carrier. It looks much much worse than it is.
The person who needs to sort his tackling technique (not as regards penalties) is Fecka.