[4] Hoser has described several species and genera of reptiles, including Pseudechis pailsei and Acanthophis wellsi (snakes in the family Elapidae).
[9] His work on the taxonomy of the Pythoninae[10] was affirmed by a later phylogenetic study,[11] but Reynolds et al. 2013, suggest the name Malayopython be used in place of Hoser's Broghammerus.
[1] Hoser's work has been described as "amateur",[14][15] “vanity publishing”,[16] not peer-reviewed,[17] "taxonomic vandalism",[1][2] extensively plagiarised,[18] and a source of confusion.
[14] [19] As a result, herpetological societies in America, Europe and Africa have resolved to ignore or over-write Hoser's nomenclature.
[26][27][28][29] He once criticised the zookeeper, conservationist and television personality Steve Irwin for giving people "false ideas about how to behave around snakes".
[32] A 2008 government tribunal ruled that Hoser's venomoid snakes cannot be handled by members of the public, due to the risk of the venom glands regrowing.
He has conducted his demonstrations in a manner which seriously compromises the welfare of the snakes he is displaying and the safety and well-being of audience members, including children and, on one occasion, his own daughter.
[45][47] In May 2013, Hoser appealed to the Victoria Court of Appeal in an attempt to overturn the Department of Sustainability and Environment's (DSE) decision to cancel his wildlife demonstrators licence and Victorian Civil and Administrative Tribunal (VCAT) deputy president Judge Pamela Jenkins's decision in 2012 to uphold that DSE cancellation of his license.
[48] In 2018, Hoser sued Sportsbet, alleging the bookmaker infringed on his trademark by using the words "snake man" in three TV ads.
In October 2018, the judge dismissed the claim for one of three relevant adverts and Hoser was ordered to pay the defendant's legal costs as agreed, which were in fact written off.