Ok, well let's say you're using an algorithm to trade, and an HFT firm identifies what your 'algorithm' is doing, they're going to front run you - whether that be using VWAP or flashing 10 lots every 30 seconds. And both of those absolutlely happen. They're not going to literally 'know' what you're going to do, but some algos are pretty obvious and somewhat exploitable.
That's not front running. You can only front run and order if you're handling the order for a third party.
Being faster than someone else isn't "front running" them nor is spotting patterns in other participant's behaviour and exploiting those patterns. The definition of "front running" is reasonably specific: https://en.wikipedia.org/wiki/Front_running
