LAYING the perfect tackle is "near impossible" when players try to draw the umpire's whistle, Adelaide veteran Scott Thompson says.

Forcing tackles to go above the shoulder to win free kicks was a major point of contention at the weekend, with North Melbourne forward Lindsay Thomas notably kicking two goals after doing that against the Sydney Swans on Friday night.

Speaking on SEN on Monday morning, Thompson called on umpires to stop rewarding those who look for the free kick.

"I'm a bit old school when it comes to that. Back in the day, if someone was to drop their knees and throw their head back it would be play on," Thompson said.

"I think teams, the way it looks now, certainly seem to be training some of those tactics, where they'll get low or slide into a contest and let the head throw back.

"I don't really like seeing it, to be honest. If throughout games umpires just let a few go, they're going to stop doing it pretty quickly.

"It is frustrating at times for the tackler because although you get told to go low … it's near impossible if someone drops at the knees and throws their head back to lay the perfect tackle."

Brad Scott and John Longmire called for the high contact rules to be reviewed but AFL football operations manager Mark Evans cautioned against any change that could cause an increase in injuries.