Is it bad practice to alter dynamic arrays that have references to them?

[simendsjo]

Just tell me if this is frowned upon... The reason I posted on SO is 
because I think it can help making people aware of D.

http://stackoverflow.com/questions/3416657/is-it-bad-practice-to-alter-dynamic-arrays-that-have-references-to-them
Let me know if it's not accepted to crosspost like this.