To be fair, even in the old days as I was saying with Meckiff, international umpires shied away from throwing the book at bowlers, pardon the pun. It's unsavoury business, not to mention inconsistent across multiple pairs of eyes. Meckiff had played 18 Tests and bowled a good 3000 'unchucked', without changing his action, mind you, when he was run out of town. Nobody really even knows why he was recalled to the side in '63 to 'throw' one over before Benaud showed decorum and removed him from his attack.
Tony Lock was a much more high profile example, except he was only called a couple of times in Tests and managed to survive it. Midway through his career, he witnessed his bowling on film for the first time and promptly changed his action, just in time to avoid the great purge. Nevertheless, he must have thrown tens of thousands of balls in first class matches, without an umpire giving so much as a hint.
Indeed a lot of bowlers particular to the Ashes of 58/59, including Lock, Meckiff, Gordon Rorke, Jimmy Burke, Keith Slater and Peter Loader, were either outright chuckers or at least worthy of discussion, and many of which clearly hadn't been called for throwing nearly enough at lower levels. With neither Australia nor England willing to concede any moral (or performance related) high ground, Bradman met with Gubby Allen and both boards agreed to a crackdown in the early 60s.
And of course the reactions were similar. Obviously Col Egar wasn't declared to be racist, but he was hated (well, he was an umpire, he certainly wasn't loved). He received death threats considered serious enough to warrant a police escort (or maybe the cops just wanted to go to the cricket).
Some went as far to say that Meckiff's unlikely Test recall was a machination by Bradman to have someone to take a fall for his crusade; although this was not to be the only time Egar called a player for throwing, given Bradman's gravitas, its not a possibility that can be easily dismissed. There was also sympathy for South African Geoff Griffin, of whom spectators could not determine the difference between the balls he was called for and the balls he wasn't called for. Perhaps the harshest penalty was reserved for Englishman Dusty Rhodes, who was cleared due to a finding of hyper-extension in 1968, when it was all too late for his Test career.