What do you think?
An individual capable of solving complex non-intuitive problems in a seemingly intuitive manner. The processes and techniques used are not necessarily methodical to the observer, but yet achieve results significantly and consistently faster than known experience would predict. A hacker is not defined in terms of intention or purpose, but rather by the talented single-mindedness of method. A hacker is not a hack. Hackers are not limited to computer hacking. [1]
The term was also used in WWII to define soldiers that could Adapt, Improvise and Overcome. U.S. Marines still use this term today.
So to answer your question I do not see an issue unless they are specifically abusing the term Computer Hackers.
[1] - https://www.urbandictionary.com/define.php?term=hacker
I think the term is heavily overused and for me it's a very specialized role of one person. There isn't really a "growth hacking team" in my opinion.
2. It's not trying to appropriate the base term, but is instead adding a modifier to make it's own type.
Ruling: mostly inoffensive.