According to the Independent, the 22-year-old earned two conduct breaches for his antics throughout the Test and as a effect, he is now set to be banned for two matches.
Kagiso Rabada starred as South Africa completed a six-wicket win over Australia at St George's Park in Port Elizabeth to level the four-test series at 1-1.
Rabada was given three demerit points, which took his total to eight points in two years, activating an automatic two-match suspension.
"To turn it around like we did, especially losing the toss, them being 90/1 in the first session... this was just a great Test match for me and showed off the huge pride and character that is in our team".
"I think I have probably been in all circumstances, I've gone too far with send-offs, and then other times where you pull it back, you know you have to be controlled", Siddle said on Monday. "I still feel our bowlers have a lot in them and they are going to come with a lot of fire tomorrow morning and hopefully knock them over".
Match referee Jeff Crowe said: "I found that there was contact between Rabada and Smith, and in my judgement the contact by Rabada was inappropriate, and deliberate. I cant keep doing this because I'm letting the team down and I'm letting myself down".
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But the fiery Rabada's conduct throughout the second Test in Port Elizabeth earned him two conduct breaches, and now he could be banned for the final two matches.
David Warner's confrontation with Quinton de Kock has dominated the agenda, with the Aussie vice-captain alleging that the batsman made "vile and disgusting" comments about his wife. It was also his fourth ten-for in his 28-Test career. "I'm not happy about it".
Lyon was caught behind off Lungi Ngidi and last man Josh Hazlewood hit a quick 17 before being caught in the deep off left-arm spinner Keshav Maharaj. Tim Paine remained unbeaten on 28 in Australia's 239, and their lead of 100 was never likely to be truly competitive.
With Smith's dismissal, Rabada was seen as brushing the Australian skipper's shoulders after dismissing him in the first innings.
If a challenge is lodged‚ South Africa team management said‚ Rabada "will still be suspended unless the judicial commissioner is appointed early and hears an argument to allow him to still compete whilst the hearing is being sorted out". The key seemed to be Mitchell Marsh, the last member of Australia's top six, who was unbeaten on 39 at the start of play.
Theunis de Bruyn brought up the winning runs when he stroked a full ball from Pat Cummins through the covers for four.
Series: The four-match series is level at 1-1.