I cannot help but agree. The run and break is the preferred method of people who seem to affect flying suits and aircraft have little purpose other than image.
That these wannbes can suggest it is a safe way of joining a circuit suggests some basic fault in their logic.
It is not a standard practice. Even the military do not use it routinely at civil fields. Doing it at airfields with air/ground and non-radio traffic might mean that there is no one to actually refuse them permission but it is still appalling 'airmanship'.
Keep it for displays and when you're trying to impress the military at their airfields (fat chance in a JP or Yak!!!).