The phrase "a controversial practice of" is correct and usable in written English.
It can be used when discussing a method or activity that is subject to public disagreement or debate.
Example: "The article explores a controversial practice of using performance-enhancing drugs in sports."
Alternatives: "a disputed method of" or "a contentious approach to".
Australia has adopted a controversial practice of approaching foreign governments for travel documents for refused asylum seekers.
The UK government has given the green light to fracking for shale gas – a controversial practice of hydraulic fracturing – under strict conditions.
Prosecutors are investigating the death of a newborn boy who died in September after contracting herpes through a controversial practice of ritual circumcision, reviving a debate in New York over safety and religious freedom.
Indeed, that has been a hallmark of the association's annual meetings since 2003, after it ended a controversial practice of selling speaking slots during each conference to sponsors; attendees had complained that the presentations were like infomercials.
In a controversial practice, many observers of Ashura will mark their love for Husayn on their own bodies, whipping their backs with blades or lacerating their heads.
This is a controversial practice and a lot of breeders don't participate, but it's still common enough to be the rule.
De La Soul was also in the vanguard of sampling -- a once controversial practice of appropriating other artists' music.
In Homeschooling: The History and Philosophy of a Controversial Practice, James G. Dwyer and Shawn F. Peters examine homeschooling's history, its methods, and the fundamental questions at the root of the heated debate over whether and how the state should oversee and regulate it.
Those documents described a controversial practice carried out by agents of the U.S. Bureau of Alcohol , Tobacco Firearms and Explosives that was designed to allow firearms to "walk" into Mexico in hopes of tracing them back to higher-level gun traffickers.
Valve's Steam has experimented with a controversial practice known as "Early Access" as of late, allowing developers to sell unfinished games in order to acquire additional funding while receiving player feedback and bug reports.
Others have made a full-time profession out of informing, a controversial practice in itself, as some critics suggest it encourages longtime informants to go after and potentially entrap low-level dealers rather than higher profile targets.
