You could, if you want, place a Midi filter FX on the track, and have it filter out the bank and program changes.
A lot depends on what on what you're trying to do. If, for instance, you were working with a orchestral track using a key-switched orchestral library (i.e. GPO4) and the patch change represented the same instrument with a different articulation (i.e pizzicato strings), you'd simply place a key-switch to switch the articulation - leaving the bank switch in place as a reference.
In other situations, it's simply easier to cut out a clip of the different instrument after the patch change (and up until the next, if any) and place the new clip onto a new track.
Last, there are times when you truly wish to keep the same instrument; you just delete or filter the patch change.
Most VSTi's these days do nothing/ignore patch changes, since most DAW's aren't limited in the number of tracks they support. The few that do are usually GM oriented and need to support the standard midi bank and patch setting commands.