How "safe" (from a best practice and supportability perspective) is the use of DLL injection techniques?

Another question in internal discussion.

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From:
Subject: RE: DLL Injection

DLL injection is never safe. You're talking about squirting code into a process that was never designed, built, or tested by the process's author, and co-opting or creating a thread to run that code. You run the risk of creating timing, synchronization, or resource issues that weren't there before or exacerbating issues that were there.